A road repair team built a road, 40 meters on the first day and 44 meters on the second day. On the second day, what was repaired more than the first day was the total length of the road (1/28), and how many meters of road remained unrepaired.
一支修路队修一条公路，第一天修了40米，第二天修了44米．第二天比第一天多修的是这条公路总长的(1/28)，还剩多少米的路未修．
<gadget id="calculator">44 - 40</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>

<gadget id="calculator">112 - 40 - 44</gadget>
<output>28</output>

<result>28</result>