The answer is displayed in scientific notation and I want to change it back to normal.

Your calculator is configured to display results in Scientific notation
8*5=40=4.*10^(01). Exit scientific mode by resetting the calculator or changing the display mode to fixed or normal.

All calculator use scientific notation if the result is too small or too large. Some, like the Casio FX9750G II, offer you two Normal displays, Norm1 and Norm2 that have different limits when numbers are converted to scientific notations.
Here is how to set one or the other.
In Run>Mat press SHIFT MODE (Setup). Scroll down or up to reach the display line. Press F3 to select Norm1 or Norm2.

Press Mode, and change display mode to float.

Get the calculator out of scientific notation display mode. Put it in Normal (1 or 2) or Floating point mode. If you have a rest button use it.

You can set your display mode to FIX or NORMAL ( 1 or 2) if you have them. However if the result is too small ( less then 0.001) or too large the calculator will use the scientific format. Generally if there are not enough display positions to show your result, the calculator uses scientific notation.

Press 2nd [SCI] to switch the calculator to display all results in scientific notation. The results are the same whether you do it in scientific notation or not, it's just how the number is displayed.

For converting answer in to scientific notation do the following steps.

1.click shift key after that press mode key next to on button.

2.From the menu that is displayed in the screen press 7 for displaying answer in scientific notation.

Thank you.

Unfortunately, you don't. For numbers whose magnitudes differ too greatly from 1, the calculator automatically switches to scientific (or engineering) notation. You can press MODE and change the display settings, but there is no setting that will force the calculator to show this number without an exponent.

Check this HP FAQ:
Setting a Fixed Decimal Place You can download the manual and user guides for your calculator from here:
http://h10025.www1.hp.com/ewfrf/wc/manualCategory?lc=en&dlc=en&cc=us&product=81575&lang=en&

For more information, Faqs & how-Tosgo the HP support homepage for your calculator:
http://h10025.www1.hp.com/ewfrf/wc/product?lc=en&dlc=en&cc=us&lang=en&product=81575&

Introduction This document describes how to set the desired number of decimal places on the HP 12c calculator in standard format. It also covers how to enter a number in scientific notation. Instructions for standard format

1. Press and release .
2. Press the number key for the desired number of decimal places to be displayed to the right of the decimal point (0 through 9). The calculator displays a maximum of 10 digits.

The display will show the specified number of decimal places. The answer will be rounded to the number of digits selected. Example (standard format) If the number in the display is 14.87456320, the display will be changed as follows: Keystroke Display 14.8746 14.9 15 14.87456320 Instructions for scientific notation Use scientific notation for very large or very small numbers. Type in the mantissa. After pressing, the next numbers keyed in are exponents of 10. Press . If during an operation a result has more than 10 digits, the calculator automatically displays the number in scientific notation

Introduction This document describes how to set the desired number of decimal places on the HP 12c calculator in standard format. It also covers how to enter a number in scientific notation. Instructions for standard format

1. Press and release .
2. Press the number key for the desired number of decimal places to be displayed to the right of the decimal point (0 through 9). The calculator displays a maximum of 10 digits.

The display will show the specified number of decimal places. The answer will be rounded to the number of digits selected. Example (standard format) If the number in the display is 14.87456320, the display will be changed as follows: Keystroke Display 14.8746 14.9 15 14.87456320 Instructions for scientific notation Use scientific notation for very large or very small numbers. Type in the mantissa. After pressing, the next numbers keyed in are exponents of 10. Press . If during an operation a result has more than 10 digits, the calculator automatically displays the number in scientific notation

ok there is not a problem. the "E" is the calculators way of scientific notation. So if u were to see 1.70 e3 it would really mean 1.70 x 10^3 which is 1700. If these are small numbers and you are getting these "e" ur calculator is in scientific notation mode. Press "mode" then at the top highlight the word "normal" and hit enter. You will be back in normal calculator mode.