kunts / additional_6

Zeros

Zeros

Task

Implement function zeros(str), that for given expression will return the number of zeros in the end of number. Expression contains only factorials of numbers and multiplying signs, like: zeros('5!*7!*6!!*7!!') 5! === 1 * 2 * 3 * 4 * 5 10!! === 2 * 4 * 6 * 8 * 10 7!! === 1 * 3 * 5 * 7

zeros('5!') // -> 1 because 5! === 120
zeros('10!') // -> 2 because 10! === 3628800
zeros('9!!*10!!') // 2 -> because 9!!*10!! === 3628800

Write your code in src/index.js