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

### Instruction:
 乔治计划给他的班级做饼干。班上有40名学生，他计划每名学生做2块饼干。如果他的同学中有10%想要燕麦葡萄干饼干，那么乔治要做多少块燕麦葡萄干饼干？


### Response:
 想要燕麦葡萄干饼干的学生有40名，因为40 x 0.1 = <<40*.1=4>>4
他要做2块燕麦葡萄干饼干，因为4 x 2 = <<4*2=8>>8