A road was planned to be built, but the actual length was 500 meters, which was 87.5 meters more than planned (3/4). How many meters is the planned road construction?
计划修一条路，实际修了500米，比计划的(3/4)多修87.5米．计划修路多少米．
<gadget id="calculator">500 - 87.5</gadget>
<output>412.5</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">412.5 / (3/4)</gadget>
<output>550</output>

<result>550</result>