The school bought 160 pens, including 40 pencils and 15 boxes of pens. How many pens are in each box?
学校买了160支笔，其中有40支铅笔和15盒钢笔，每盒钢笔多少支？
<gadget id="calculator">160 - 40</gadget>
<output>120</output>

<gadget id="calculator">120 / 15</gadget>
<output>8</output>

<result>8</result>