Sometimes I want to explain to laymen/new students/laywomen how addition modulo N works. There are some instructive analogies: Addition on the clock (12), Addition on weekdays (7). They illustrate the idea "N=0" well.
However, what I struggle with is to give an analogy for multiplication mod N. Something like "Thursday times Tuesday is Monday" - but it should have some interpretation "in real life".
What kind of examples can I use?