The values in an array could be used to represent digits in the decimal

representation of a number. For example, the number $1$

$7$

has decimal

representation $0\mathrm{.}142857...$ and that could be stored in an array whose elements

started $\{1,4,2,...\}.$ For a number stored that way write code that multiplies

the number by a given integer, returning the whole number part of the result

and leaving the array updated to hold the fractional part of the product.