yeah， it's correct

You are right~

这个正确吗？=Is this correct?

This guy is asking if his Chinese is correct. LOL.

You're asking how to say 'Is this correct?' in Chinese? You know how to type "这个用汉语怎么说？" but not sure how to ask 'is this correct?' or are you asking if typing "这个用汉语怎么说？" is correct?