A construction team builds a road. (1/4) built this section of road in the first week, and (1/5) built this section of road in the second week. The second week repaired 3.2 kilometers more than the first week. How long is this road in kilometers?
某工程队修筑一条公路．第一周修了这段公路的(1/4)，第二周修筑了这段公路的(1/5)，第二周比第一周多修了3.2千米．这段公路全长多少千米？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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

<gadget id="calculator">(1/4) - (1/5)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">3.2 / (1/20)</gadget>
<output>64</output>

<result>64</result>