Write Number in Expanded Form
const expandedForm = num => {
let pow = []
let decimal = []
num = num.toString().split('')
let len = num.length
for(let i = 0; i <= len - 1; i++){
pow.unshift(i)
}
num.forEach((x,index) => {
x = parseInt(x)
decimal.push(x*10**pow[index])
})
let toDecimal = decimal.filter(a => a !== 0)
return toDecimal.toString().split(',').join(' + ')
};
console.log(expandedForm(70304))
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