Mom went to the supermarket and bought 7 bags of washing powder, and paid the salesperson 100 yuan, and the salesperson got back 16 yuan. How much is the average price of each bag of washing powder?
妈妈去超市买了7袋洗衣粉，付给营业员100元，营业员找回了16元，平均每袋洗衣粉售价多少元？
<gadget id="calculator">100 - 16</gadget>
<output>84</output>

<gadget id="calculator">84 / 7</gadget>
<output>12</output>

<result>12</result>