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

### Instruction:
 一只白犀牛重5100磅，一只黑犀牛重1吨。7只白犀牛和8只黑犀牛总共有多重？


### Response:
 黑犀牛 = 1吨 = <<2000=2000>>2000磅
5100 * 7 = <<5100*7=35700>>35,700磅
2000 * 8 = <<2000*8=16000>>16,000磅
35,700 + 16,000 = <<35700+16000=51700>>51,700磅
7只白犀牛和8只黑犀牛总共有51,700磅。