5Raised.js

/*
Jack really likes his number five: the trick here is that you have to multiply each number by 5 raised to the number of digits of each numbers, so, for example:

multiply(3)==15
multiply(10)==250
multiply(200)==25000
multiply(0)==0
multiply(-3)==-15
*/

//Answer//

function multiply(n){
return n* (5**(Math.abs(n).toString().length))
}