Two road repair teams, A and B, jointly repair a road. The length of the road repaired by team A doubles to 30 meters, which is the same as that of team B. Team A repaired 250 meters. How many meters is this road?
甲乙两个修路队合修完一条公路，甲队修的公路长增加到2倍多30米，才和乙队修的一样多，甲队修了250米．这条公路长多少米？
<gadget id="calculator">250 * 2</gadget>
<output>500</output>

<gadget id="calculator">500 + 30 + 250</gadget>
<output>780</output>

<result>780</result>