The number of copies you get depends on how many times you do the cycling.

具体的产物数量取决于你进行循环的次数

耶鲁公开课 - 生物医学工程探索课程节选

How many" is so useful for when you're asking a question about how many numbers there are.

当你想知道具体数量的时候，“How many”非常有用。

How many课堂 - SpeakingMax英语口语达人