A road is x meters long. After repairing (2/3), how many meters are left?
一条路长x米，修了它的(2/3)，还剩多少米．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 - (2/3)</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>