The school bought 4 boxes of chalk, 25 boxes in each box, and spent a total of 300 yuan. How much is each box of chalk?
学校买来4箱粉笔，每箱25盒，共花了300元，每盒粉笔多少元？
<gadget id="calculator">25 * 4</gadget>
<output>100</output>

<gadget id="calculator">300 / 100</gadget>
<output>3</output>

<result>3</result>