"How many" in Engpsh is written as "how many" and pronounced as /haʊ ˈmeni/.
It is used as an interrogative pronoun to ask about the number of things, people, or events.
For example:
How many apples do you want? (你想要多少个苹果？)
How many students are there in your class? (你班里有多少学生？)
The usage of "how many" has been recorded since the 14th century and is a common phrase in both spoken and written Engpsh.