英语你买了多少蛋糕怎么说

如果你想要问别人买了多少蛋糕，你可以说："How many cakes did you buy?" 或者 "What is the number of cakes you bought?" 如果你想要告诉别人你买了多少蛋糕，你可以说："I bought X cakes." 或者 "The number of cakes I bought is X." 其中，X 是你买的蛋糕数量的数字。