The school bought 9 boxes of printing paper for 1440 yuan, each box contains 8 packs, how much is each pack of printing paper?
学校用1440元钱买了9箱打印纸，每箱装有8包，每包打印纸多少钱？
<gadget id="calculator">1_440 / 9 / 8</gadget>
<output>20</output>

<result>20</result>