The road construction team built a road with a length of 405 meters. On the first day, 75 meters were repaired, and on the second day, 87 meters were repaired. The rest was planned to be completed in 3 days.
修路队修一条长405米的道路，第一天修了75米，第二天修了87米，剩下的计划3天修完，剩下的平均每天要修多少米？
<gadget id="calculator">75 + 87</gadget>
<output>162</output>

<gadget id="calculator">405 - 162</gadget>
<output>243</output>

<gadget id="calculator">243 / 3</gadget>
<output>81</output>

<result>81</result>