The road repair team repairs a section of road, and (3/8) have already repaired this section of road. If another 100 meters are repaired, there will be as many repaired and unrepaired roads. How many meters is this road?
修路队修一段公路，已经修了这段公路的(3/8)，如果再修100米，已修的和没修的就同样多．这段公路长多少米？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(1/2) - (3/8)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">100 / (1/8)</gadget>
<output>800</output>

<result>800</result>