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

### Instruction:
 Jessa需要为每个有30名学生的三个四年级班级和一个有50名学生的体育课制作杯子蛋糕。她需要制作多少个杯子蛋糕？


### Response:
 对于四年级班级，Jessa需要3个班级 * 每个班级30个杯子蛋糕 = <<3*30=90>>90个杯子蛋糕
加上体育课的杯子蛋糕50个，总共需要制作的杯子蛋糕为50 + 90 = <<50+90=140>>140个