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

### Instruction:
Rob has some baseball cards, and a few are doubles. One third of Rob's cards are doubles, and Jess has 5 times as many doubles as Rob. If Jess has 40 doubles baseball cards, how many baseball cards does Rob have?

### Response:
Rob has 40/5=<<40/5=8>>8 doubles baseball cards.
Rob has 8*3=<<8*3=24>>24 baseball cards.
#### 24