40% of a 1200-meter-long road has been built, how many meters are left to be repaired?
修一条1200米长的道路，已经完成了40%，还剩下多少米没有修？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1_200 * (3/5)</gadget>
<output>720</output>

<result>720</result>