Mr. Li took 1000 yuan to buy sporting goods. He bought 12 basketballs and left 100 yuan. So how much is each basketball?
李老师拿1000元去购买体育用品，他买了12个篮球，还剩下100元．那么每个篮球多少元呢？
<gadget id="calculator">1_000 - 100</gadget>
<output>900</output>

<gadget id="calculator">900 / 12</gadget>
<output>75</output>

<result>75</result>