system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: if multiplying by Zero returns Zero, why does division by Zero return 'undefined'?
gpt
Let's use a 1-pound chocolate bar. 

Multiplication: if you have a 4 count of 1-pound chocolate bars, you have 4 pounds of chocolate. If you have no 1-pound chocolate bars, you have 0 pounds of chocolate. Makes perfect sense. 

Division: If you cut the chocolate bar into 4 equal parts, each part is 4 ounces (1/4 of a pound). But try cutting a chocolate  bar into zero equal parts... conceptually that makes no sense. If you say that this means removing or destroying the chocolate bar, that would actually be subtraction. In effect, you want to collapse the chocolate bar into fewer than one piece but still expect all 16 ounces of chocolate to still be present in this space where there is no chocolate bar.