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

### Instruction:
Cornelia likes to travel. She visited already 42 different countries. 20 of them were in Europe and 10 in South America. From the rest of the countries, only half of them were in Asia. How many Asian countries has Cornelia visited?

### Response:
Cornelia visited 42 - 20 - 10 = <<42-20-10=12>>12 countries that were not in Europe or South America.
Of those 12 countries, half of them, or 12 / 2 = <<12/2=6>>6 were in Asia.
Cornelia visited 6 Asian countries.
#### 6

