The road repair team wants to build a 120-kilometer road. It has been repaired for 40 days, 1.2 kilometers per day, and the remaining 30 days are completed. How many kilometers per day are they repaired on average?
修路队要修一条120千米的公路，已经修了40天，每天修1.2千米，余下的30天修完，平均每天修多少千米？
<gadget id="calculator">40 * 1.2</gadget>
<output>48</output>

<gadget id="calculator">120 - 48</gadget>
<output>72</output>

<gadget id="calculator">72 / 30</gadget>
<output>12/5 = around 2.4</output>

<result>12/5 = around 2.4</result>