Mom bought 8 teacups for 100 yuan, and the salesperson found 28 yuan. How much is each teacup?
妈妈100元买8个茶杯，营业员找了28元每个茶杯多少元？
<gadget id="calculator">100 - 28</gadget>
<output>72</output>

<gadget id="calculator">72 / 8</gadget>
<output>9</output>

<result>9</result>