Answer
9,876,543,210.100200300
Work Step by Step
In a decimal, either the word "and" or a decimal point separate the whole number from the fraction. In this decimal, the fraction ends in the billionths place, which is 9 digits to the right of the decimal point. The whole number (9,876,543) is on the left of the decimal point, and the fraction (.100200300) is on the right of the decimal point: 9,876,543,210.100200300.