YOU SAID:

How big would a cow be if a train is small?

INTO JAPANESE

電車が小さいと牛はどれくらい大きくなりますか？

BACK INTO ENGLISH

How big will a cow be if the train is small?

INTO JAPANESE

電車が小さい場合、牛はどのくらいの大きさになりますか？

BACK INTO ENGLISH

When the train is small, how big is the cow?

INTO JAPANESE

電車が小さいとき、牛はどれぐらい大きいのですか。

BACK INTO ENGLISH

When the train is small, how big is the cow?