Some fruits are sold (1/2) of the total number for the first time, and the remaining (1/2) is sold for the second time. How much of the total number of these fruits are there?
有一些水果，第一次卖出总数的(1/2)，第二次又卖出余下的(1/2)，这些水果还有总数的多少
<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">(1/2) * (1/2)</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>