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

### Instruction:
 第一选区有322名选民。第二选区比第三选区少19名选民。第三选区的选民人数是第一选区的两倍。第一到第三选区总共有多少选民？


### Response:
 D1:322, D3:2*322=644, D2:644-19=625
322+625+644=<<322+625+644=1591>>1591名选民