A bottle of milk, Xiaohong drank (7/8), how much is left in the bottle.
一瓶牛奶，小红喝了(7/8)，瓶中还有多少．
<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">1 - (7/8)</gadget>
<output>1/8 = around 0.125</output>

<result>1/8 = around 0.125</result>