There are 387 towels in the store, which are divided into 6 boxes, and there are 117 towels left. Ask: How many towels are packed in each box?
商店有387条毛巾，分装在6个箱子里，还剩下117条毛巾，问：平均每箱装多少条毛巾？
<gadget id="calculator">387 - 117</gadget>
<output>270</output>

<gadget id="calculator">270 / 6</gadget>
<output>45</output>

<result>45</result>