A road was repaired on the first day (5/8), and on the second day (1/8), leaving ((())/(())) unrepaired.
一条路第一天修了(5/8)，第二天修了(1/8)，还剩((())/(()))没修．
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

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

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

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