To build a road, it is planned to build 1.2 kilometers per day, which is 0.2 kilometers less than the actual daily construction, and the road is actually completed five days ahead of schedule. Ask for the highway chief.
修一条公路，计划每天修1.2千米，比实际每天少修0.2千米，实际提前五天修完这条公路．求公路长．
<gadget id="calculator">1.2 + 0.2</gadget>
<output>1.4</output>

<gadget id="calculator">5 / 0.2</gadget>
<output>25</output>

<gadget id="calculator">1.4 * 25</gadget>
<output>35</output>

<gadget id="calculator">1.2 * 35</gadget>
<output>42</output>

<result>42</result>