The road construction team wants to build a 4,200-meter-long road, and it is planned to finish it in 7 days, but it actually repairs 700 meters a day. How many days earlier than planned?
修路队要修一条长4200米的公路，计划7天修完，实际每天修700米，实际比计划提前几天完成？
<gadget id="calculator">4_200 / 700</gadget>
<output>6</output>

<gadget id="calculator">7 - 6</gadget>
<output>1</output>

<result>1</result>