The school buys 9 boxes of colored chalks, 37 boxes of white chalks, and how many boxes of white chalks are bought. The white chalks are 8 times the amount of colored chalks.
学校买9盒彩色粉笔，37盒白粉笔，再买多少盒白粉笔，白粉笔就是彩色粉笔的8倍．
<gadget id="calculator">9 * 8</gadget>
<output>72</output>

<gadget id="calculator">72 - 37</gadget>
<output>35</output>

<result>35</result>