A highway has been built for 20 kilometers, which is less than the unbuilt one (3/8). How many kilometers is this road?
修一条公路，已经修了20千米，比未修的少(3/8)，这条公路有多少千米？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (3/8)</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">20 / (5/8)</gadget>
<output>32</output>

<gadget id="calculator">32 + 20</gadget>
<output>52</output>

<result>52</result>