A certain retailer shipped 24 boxes of soap, sold half of it on the first day, and sold the remaining half on the second day, how many boxes of soap are left in the store.
某个体户运到24箱肥皂，第一天卖出一半，第二天卖出剩下的一半，商店里还剩下多少箱肥皂．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) * (1/2)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/2) - (1/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">24 * (1/4)</gadget>
<output>6</output>

<result>6</result>