A construction team builds a road. On the first day, 38 meters were repaired, and on the second day, 42 meters were repaired. What was repaired less on the first day than on the second day was (1/28) of the full length of the road. How long is this road in meters?
某工程队修筑一条公路．第一天修了38米，第二天修了42米．第一天比第二天少修的是这条公路全长的(1/28)．这条公路全长多少米？
<gadget id="calculator">42 - 38</gadget>
<output>4</output>

<gadget id="calculator">1 / 28</gadget>
<output>1/28 = around 0.035714</output>

<gadget id="calculator">4 / (1/28)</gadget>
<output>112</output>

<result>112</result>