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

### Instruction:
Daria is raising money for a new vacuum cleaner. So far, she has collected $20 in her piggy bank and has decided to put $10 in it each week. If the vacuum cleaner costs $120, how many weeks will it take her to raise enough money to cover this expense?

### Response:
The vacuum cleaner costs $120, so Daria needs 120 - 20 = $<<120-20=100>>100 more.
Daria will need 100 / 10 = 10 more weeks, to be able to buy the vacuum cleaner.
#### 10