The engineering team plans to finish repairing a 240-meter-long road in 5 days, with an average of 42 meters per day in the first 3 days. If the project is to be completed on schedule, how many additional meters must be repaired every day?
工程队计划5天修完一条长240米的路，前3天平均每天修42米，如果要按期完工，剩下的每天必须多修多少米？
<gadget id="calculator">42 * 3</gadget>
<output>126</output>

<gadget id="calculator">240 - 126</gadget>
<output>114</output>

<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">114 / 2</gadget>
<output>57</output>

<gadget id="calculator">57 - 42</gadget>
<output>15</output>

<result>15</result>