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

### Instruction:
Eduardo is a teacher. He taught 3 classes last week while his colleague Frankie taught double what Eduardo teaches. How many classes did Eduardo and Frankie teach in total?

### Response:
Frankie taught 2 * 3 = <<2*3=6>>6 classes.
Combined, Frankie and Eduardo taught 3 + 6 = <<3+6=9>>9 classes.
#### 9