A train with a length of 350 meters passes through a tunnel with a length of 1,550 meters. It takes 2 minutes for the train to pass through the tunnel and leave the tunnel at the rear. How many minutes does it take to pass through a bridge with a length of 4,400 meters at the same speed?
一列长350米的火车，通过一座长1550米的隧道，从车头开过隧道到车尾离开隧道用了2分钟，以同样的速度要通过一座4400米长的大桥，需要多少分钟．
<gadget id="calculator">4_400 + 350</gadget>
<output>4_750</output>

<gadget id="calculator">1_550 + 350</gadget>
<output>1_900</output>

<gadget id="calculator">1_900 / 2</gadget>
<output>950</output>

<gadget id="calculator">4_750 / 950</gadget>
<output>5</output>

<result>5</result>