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

### Instruction:
 有2450张纸均匀地分成5个文件夹。贾斯汀拿了一个文件夹，上面的纸的一半被她涂了颜色。贾斯汀用了多少张纸？


### Response:
 2450张纸 / 5个文件夹 = <<2450/5=490>>490张纸/文件夹
490张纸/文件夹 * (1/2) = <<490*(1/2)=245>>245张纸/文件夹
贾斯汀涂了245张纸。