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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

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