First we round it off to the nearest millions.
6,852,472,823 rounded off - 6,852,000,000
then you move the decimal point to the left until the number becomes between 1 and 10
-- 6.852000000
count the numbers to the right of the decimal point, remove the zeroes, then write it as
6.852 x 10^9 or 6.852e9
9 is how many numbers are in the right of the decimal point, which was 852000000
