There is a standard of pencils, 72 yuan per box, 8 pieces per box, one can be given as a gift when buying a box, Lingling buys 9 pencils like this, how much is each pencil on average?
有一种规格的铅笔，每盒72元，每盒8支，买一盒可以赠一支，玲玲买这样的9支铅笔，平均每支铅笔多少钱？
<gadget id="calculator">8 + 1</gadget>
<output>9</output>

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

<result>8</result>