Online, multiplicate por cero circulates as a compact Spanish-language reaction clip, shared by creators who want a fast, self-explanatory punchline for moments when something is reduced to nothing. Its appeal is in the maths itself: multiplying by zero always gives zero, so the phrase instantly frames a boast, plan or score as worthless without needing extra context. That simplicity makes it easy to drop into memes, short videos and chat replies, where a single line can end a joke more cleanly than a longer explanation.