The construction team builds a road. On the first day, it repairs the full length (2/5), and on the second day it repairs the full length (1/4). The first day is 120m longer than the second day. What is the total length of this road in meters? ?
施工队修一条路，第一天修了全长的(2/5)，第二天修了全长的(1/4)，第一天比第二天多修120m，这条路全长多少米？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(2/5) - (1/4)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">120 / (3/20)</gadget>
<output>800</output>

<result>800</result>