Uncle Li’s family received a total of 100 kilograms of apples, and there are 37 kilograms left after packing 9 boxes. How many kilograms are in each box on average?
李叔叔家一共收了100千克苹果，装了9箱后还剩37千克，平均每箱装多少千克？
<gadget id="calculator">100 - 37</gadget>
<output>63</output>

<gadget id="calculator">63 / 9</gadget>
<output>7</output>

<result>7</result>