Overhaul a 583-kilometer-long railway. Team A starts from its southern end and overhauls 23 kilometers a day. One day after team A started work, team B started from its northern end and overhauled 47 kilometers every day. In a few days, teams A and B will just finish overhauling the railway?
检修一条长583千米的铁路，甲队从它的南端开始，每天检修23千米．甲队开工1天后，乙队从它的北端开始，每天检修47千米．再过几天，甲、乙两队刚好检修完这条铁路？
<gadget id="calculator">583 - 23</gadget>
<output>560</output>

<gadget id="calculator">23 + 47</gadget>
<output>70</output>

<gadget id="calculator">560 / 70</gadget>
<output>8</output>

<result>8</result>