Cake seller, 4 yuan, 1 yuan, 2 yuan, 3 yuan, 4 yuan, 5 yuan, 6 yuan, 7 yuan, 8 yuan, this. ...

4 yuan is a catty, 2 yuan is half a catty, and 1 yuan is 225 cents.

The easiest way is to make your cake 1 225 cents, and ensure that two cakes are half a catty and four cakes are a catty, so that a cake can be sold for one yuan.

If the weight of each cake is about three or two, it's not good to forget it, even if it's big.