<human>:  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?
<bot>: How many times does Helen hand wash her pillowcases in a year? ** She hand washes them every 4 weeks and there are 52 weeks in a year so she washes them 52/4 = <<52/4=13>>13 times per year
How many minutes does Helen spend hand washing her pillowcases in a year? ** It takes her 30 minutes to hand wash the pillowcases and she does this 13 times per year for a total of 30*13 = <<30*13=390>>390 minutes per year
#### 390