The original price of each pin is $20.
The discount is 15%, which means John gets 15/100 * $20 = $3 off each pin.
So, the discounted price for each pin is $20 - $3 = $17.
John bought 10 pins, so the total amount he spent on pins is $17 * 10 = $170.
#### 170
The answer is: 170
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
John decided to buy 10 pins for himself.  They are normally $20 each but they were on sale for 15% off.  How much did he spend on pins?

### Answer:
