# Умножение: общий случай
## Ссылка на видеоразбор
https://youtu.be/NKhwfK0PurY
## Код из книги
	let real_mul x y n =
	let n2 = n + 2 in
	let r = n2 / 2 in
	let s = n2 − r in
	let xr = x(r)
	and ys = y (s) in
	let p = log2 xr
	and q = log 2 ys in
	if p = 0 & q = 0 then Int 0 else
	let k = q + r + 1
	and l = p + s + 1
	and m = p + q + 4 in
	(x(k) ∗/ y(l)) ndiv ( Int 2 ∗∗/ Int m) ;;