In order to welcome the Olympic Games, our city carries out city appearance construction. In the first quarter of this year, a total of 298.4 kilometers of roads need to be repaired. After two months of repairs, there are still 72.8 kilometers left. How many kilometers of roads are repaired per month on average in January and February?
为了迎接奥运会，我市进行市容建设．今年第一季度共需修整道路298.4千米，修整了两个月还剩下72.8千米，一、二月份平均每月修整道路多少千米？
<gadget id="calculator">298.4 - 72.8</gadget>
<output>225.6</output>

<gadget id="calculator">225.6 / 2</gadget>
<output>112.8</output>

<result>112.8</result>