human
Trent walked 4 blocks from his house to the bus stop. He rode the bus 7 blocks to the library. Later, he came home the same way. How many blocks did Trent travel in all?
assistant
How many blocks did Trent travel on the bus? ** On the way to the library, Trent went 4 blocks + 7 blocks = <<4+7=11>>11 blocks.
How many blocks did Trent travel in all? ** Trent came home the same way so he went 11 blocks + 11 blocks = <<11+11=22>>22 blocks.
#### 22