The store bought (3/4) kilograms of chestnuts, sold (1/4) on the opening day, and left ((())/(())).
商店购进(3/4)千克栗子，开业那天卖去了(1/4)，还剩((())/(()))．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>