Mom bought a box of chocolates, Maomao ate all (1/4), and mom ate all (1/4), how much is left?
妈妈买了一盒巧克力，毛毛吃了全部的(1/4)，妈妈也吃了全部的(1/4)，还剩几分之几？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4) - (1/4)</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>