Place a decimal after the first digit of your number. For example, if your number is 50,000, put the decimal after 5 and write the number as 5.0000. The coefficient is 5.00.
How to Calculate Orders of Magnitude in Exponents
Scientific notation is a strategy for writing numbers that are too large or too small to conveniently write in the normal notation. For example, the number 123,000,000,000 converts to 1.23 x 10^11 in scientific notation. The first number of a scientific notation must be between 1 and 10. This number is referred to as the coefficient. The second number, referred to as the base, must always be 10. The base is then raised to a positive or negative exponent. In 1.23 x 10^11, 1.23 is the coefficient and 11 is the exponent.
Instructions

Converting a Number to Scientific Notation

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Count the number of digits from the decimal to the end. In 5.0000, there are four digits. The exponent is 4.


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Write the number in scientific notation: coefficient x 10^exponent. In our example, 50,000 translates to 5.00 x 10^4.
Converting Scientific Notation to a Number

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Determine whether you have a positive or negative exponent. For example, 10^3 is a negative exponent.

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Move the decimal the number of places equal to the value of the exponent, adding zeros if necessary. If the exponent is positive, move the decimal place right. A negative exponent shifts the decimal place to the left.

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Move the decimal place three steps to the left if you have 7.8 x 10^3, forming .0078.

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References
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