Some English phrases are clearly talking about multiplication. You hear that, phrases? We can read through your subtext.
Also, any English phrase that talks about taking multiple copies of a number is actually talking about multiplication. Doesn't matter if they're in color or in black and white, stapled or otherwise.
If we quadruple the number four we get 4 × 4. "Quadruple'' isn't used as much as "double'' or "triple,'' but if you do see it, now you'll know. "Quad'' means "four'', like in the words "quadruped'' (four-legged animal), "quadriceps" (four-part muscle), or "quadrimom" (four-headed mother).