Recursive division using only subtraction and addition

script.js

/*
 * @param a int {Amount to be divided}
 * @param b int {Number of times the @ param1 value will be divided}
 */
function recursive_division (a, b){
    if (b == 0) 
        throw new Error('Cannot divide by zero')
    else if (a < b)
        return [0, a]
    else
        [x, y] = recursive_division(a - b, b)
        return [x+1, y]
}

console.log(recursive_division(20, 2)) // output: [10, 0]