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

### Instruction:
Every 4 weeks, Helen hand washes her silk pillowcases.  It takes 30 minutes to hand wash all of them.  In 1 year, how much time does Helen spend hand washing her pillowcases?

### Response:
Every 4 weeks, Helen hand washes her silk pillowcases and it takes 30 minutes to hand wash all of them.
Since there are 52 weeks in a year, she washes them 52/4 = <<52/4=13>>13 times per year.
So in 1 year, Helen spends 13*30 = <<13*30=390>>390 minutes hand washing her pillowcases.
#### 390