Subject + 有 + 多少 + Measure Word + Noun
多少 means "how many" or "how much," used to ask about quantities. Unlike 几, which implies a small number, 多少 has no such limitation and works for any quantity. Place it before the measure word and noun in a question.
你们学校有多少学生?
Nǐmen xuéxiào yǒu duōshao xuéshēng?
How many students are there in your school?
这件衣服多少钱?
Zhè jiàn yīfu duōshao qián?
How much does this piece of clothing cost?
你每天花多少时间学中文?
Nǐ měi tiān huā duōshao shíjiān xué Zhōngwén?
How much time do you spend studying Chinese every day?