function octalToDecimal (num) {
let dec = 0
let base = 1
while (num > 0) {
const r = num % 10
num = Math.floor(num / 10)
dec = dec + (r * base)
base = base * 8
}
return dec
}
export { octalToDecimal }
// > octalToDecimal(56)
// 46
// > octalToDecimal(2365)
// 1269