To build a road, the road has been repaired three times as much as it has not been repaired, and 1200 meters have been repaired. How long is this road in meters?
修一条路，已修的是没修的3倍，已经修了1200米．这条路全长多少米？
<gadget id="calculator">1_200 / 3</gadget>
<output>400</output>

<gadget id="calculator">1_200 + 400</gadget>
<output>1_600</output>

<result>1_600</result>