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Where 9.89 x 10^(-19) is the standard form of 0.000000000000000000989 and we don’t need to write so many zeroes. The first value which is 9.89 is always lie between 1 to 10 that is place the decimal after one digit as here we have placed after 9 then move the decimal place and count the zeroes, write the number of zeroes in the power of 10. Here we have shifted the decimal 19 place.

Therefore the standard form of 0.000000000000000000989 is 9.89 x 10 ^ (-19)

Therefore, the standard form of 7543200000000000000000 is 7.5432 x 10^ 21.

Simply you can write a number for a expanded form.

We can convert this expanded number into a simple number as 2395187.