...I am memorizing the multiplication table of 20, up to 20 x 20. When I have done that, I will learn the multiplication table of 30, and so on, up to 100 x 100.

I do this while taking a walk.

Then, when someone says "79 times 57, how much is it?" I immediately answer: "4503". Then the others look at me admiringly and say: how intelligent and quick-witted griffith is!

And I smile smugly and say modestly: no, it was nothing, let's forget it...