The road construction team has built a road, and it has built 3/4 of its full length, which is exactly 1 km beyond the midpoint. How many kilometers is the total length of this road?
修路队修一条路，已经修了全长的(3/4)，正好超过中点1千米，这条路全长多少千米？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(3/4) - (1/2)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / (1/4)</gadget>
<output>4</output>

<result>4</result>