Two engineering teams, A and B, jointly lay a 2,450-meter-long canal, and each works from one end to the other. Team A lays 230 meters per day, and team B lays 260 meters per day. How many days can it be completed?
甲，乙两个工程队共同铺设一条长2450米的水渠，各从一端相向施工，甲队每天铺设230米，乙队每天铺设260米，多少天能完工？
<gadget id="calculator">230 + 260</gadget>
<output>490</output>

<gadget id="calculator">2_450 / 490</gadget>
<output>5</output>

<result>5</result>