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

### Instruction:
 Micah每分钟可以打字20个字，Isaiah每分钟可以打字40个字。Isaiah在一个小时内比Micah多打了多少个字？


### Response:
 Micah每小时可以打字60 x 20 = <<60*20=1200>>1200个字。
Isaiah每小时可以打字60 x 40 = <<60*40=2400>>2400个字。
Isaiah在一个小时内比Micah多打了2400 - 1200 = <<2400-1200=1200>>1200个字。