The store shipped 20 boxes of apples, each weighing 24 kg, and sold an average of 40 kg per day. How many days did they sell out?
商店运来20箱苹果，每箱24千克，平均每天卖出40千克，多少天卖完？
<gadget id="calculator">24 / 40</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">20 * (3/5)</gadget>
<output>12</output>

<result>12</result>