After Xiaohong drank (1/8) of a glass of milk, Xiaodong then drank the whole cup (5/8), how much milk is left?
一杯牛奶，小红喝了(1/8)后，小东接着喝了全杯的(5/8)，还剩多少牛奶？
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">1 - (1/8) - (5/8)</gadget>
<output>1/4 = around 0.25</output>

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