@jussipekonen Not for me. Or not that way. I use lattice multiplication. I saw it demonstrated in an old Mathematics book from the 1920s & was hooked on the method.
https://en.wikipedia.org/wiki/Lattice_multiplication
// @neilco
@jussipekonen Not for me. Or not that way. I use lattice multiplication. I saw it demonstrated in an old Mathematics book from the 1920s & was hooked on the method.
https://en.wikipedia.org/wiki/Lattice_multiplication
// @neilco