To build a road, 120m was built on the first day, and 180m was built on the second day. At this time, the full length (2/5) remains unrepaired. How many meters are left unrepaired?
修一条公路，第一天修了120m，第二天修了180m，这时还剩全长的(2/5)没有修．还剩多少米没有修？
<gadget id="calculator">120 + 180</gadget>
<output>300</output>

<gadget id="calculator">2 / 5</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">300 / (3/5)</gadget>
<output>500</output>

<gadget id="calculator">500 * (2/5)</gadget>
<output>200</output>

<result>200</result>