Mom went to the supermarket and bought 4 boxes of the same biscuits, paid 50 yuan, and got back 7.2 yuan. How much is the price of each box of biscuits?
妈妈去超市买了4盒同样的饼干，付出50元，找回7.2元．每盒饼干的售价是多少元？
<gadget id="calculator">50 - 7.2</gadget>
<output>42.8</output>

<gadget id="calculator">42.8 / 4</gadget>
<output>10.7</output>

<result>10.7</result>