The road repair team has built a road, 80 meters have been repaired, which is exactly 2/5 of the total length. How many meters of this road are left to be repaired?
修路队修一条公路，已经修好80米，正好占全长的(2/5)，这条公路还剩下多少米没有修？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">80 / (2/5)</gadget>
<output>200</output>

<gadget id="calculator">200 - 80</gadget>
<output>120</output>

<result>120</result>