To build a road, its (1/5) was repaired in the first month, and its (1/3) was repaired in the second month, and the second month was repaired 20 kilometers more than the first month. How long is this road?
修一条路，第一个月修了它的(1/5)，第二个月修了它的(1/3)，第二个月比第一个月多修了20千米．这条路有多长？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/3) - (1/5)</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">20 / (2/15)</gadget>
<output>150</output>

<result>150</result>