50 military vehicles are lined up in a row and pass a bridge at a speed of 300 m/min. The distance between the two vehicles is 2 meters. The length of the bridge is 200 meters. Each vehicle is 5 meters long.
50辆军车排成一列，以300米/分的速度通过一座桥，前后两车之间保持2米距离，桥长200米，每辆车长5米，全部车通过桥需多少秒．
<gadget id="calculator">50 - 1</gadget>
<output>49</output>

<gadget id="calculator">49 * 2</gadget>
<output>98</output>

<gadget id="calculator">50 * 5</gadget>
<output>250</output>

<gadget id="calculator">98 + 250</gadget>
<output>348</output>

<gadget id="calculator">348 + 200</gadget>
<output>548</output>

<gadget id="calculator">548 / 5</gadget>
<output>548/5 = around 109.6</output>

<result>548/5 = around 109.6</result>