Mom brought 100 yuan and bought 8 kilograms of apples. The salesperson returned 28 yuan. How much is each kilogram of apples?
妈妈带100元钱，买了8千克苹果，营业员找回28元，每千克苹果多少元？
<gadget id="calculator">100 - 28</gadget>
<output>72</output>

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

<result>9</result>