Multiplying Numbers in Scientific Notation
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Remember that when you multiply numbers with zeroes at the end, you just multiply the numbers, then add the zeroes afterwards.

Example: Multiply 200 x 4000.
To multiply 200 x 4000, multiply the 2 and the 4, then add all the zeroes at the end:

When all 3 numbers are written in scientific notation, notice that we can just multiply the first two numbers and add the powers.

Steps to multiply numbers in scientific notation are as follows:
1) Multiply the coefficients (the first part of the numbers).
2) Add the powers of ten.
3) Adjust the result if necessary so that it's in scientific notation (see next example).

Example: Multiply 3.2 x 105 by 8.09 x 107.

Step 3. 25.888 x 1012 is not in scientific notation because 25.888 is not between 1 and 10. So adjust the number into scientific notation.
25.888 x 1012 = 2.5888 x 1013
 final answer

 Move decimal once to left toget the numberbetween 1 and 10.

 Moving once to leftdecreases 25.888 by one power of 10, therefore...

 We compensate byincreasing the power of 10 by one.
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 Dividing Numbers in Scientific Notation Addition and Subtraction of Numbers in Scientific Notation

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