The school bought back 8 boxes of chalk, 36 boxes in each box, half of which were used up, how many boxes are left?
学校买回8箱粉笔，每箱36盒，用去了一半，还剩下多少盒？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">36 * 8 * (1/2)</gadget>
<output>144</output>

<result>144</result>