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

### Instruction:
The sum of the three numbers is 500. If the first number is 200, and the value of the second number is twice the value of the third number, find the value of the third number.

### Response:
The sum of the first and second number is 500-300=200
If the second number is twice the third number, the third number is 200/2=<<200/2=100>>100
#### 100