A box of biscuits, Xiaohong ate (1/4) of it, and mother ate (1/8) of it, how much of this box of biscuits is left
一盒饼干，小红吃了它的(1/4)，妈妈吃了它的(1/8)，还剩这盒饼干的多少
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 - (1/4) - (1/8)</gadget>
<output>5/8 = around 0.625</output>

<result>5/8 = around 0.625</result>