Below is an instruction that describes a task. Write a response that appropriately completes the request in Chinese. Please answer in Chinese.

### Instruction:
 这个房子的尺寸是20.5英尺乘以10英尺。门廊的尺寸是6英尺乘以4.5英尺。房子和门廊都需要屋顶瓦片。需要多少平方英尺的屋顶瓦片来覆盖房子和门廊？


### Response:
 房子 = 20.5 * 10 = <<20.5*10=205>>205平方英尺
门廊 = 4.5 * 6 = <<4.5*6=27>>27平方英尺
205 + 27 = <<205+27=232>>232平方英尺
需要232平方英尺的屋顶瓦片。