There are 303 people in our school, lined up in a three-way column. There is 0.5m between each two people. It takes 4 minutes to leave the bridge from the head of the team to the tail of the bridge. The team walks 200m per minute. Find the length of the bridge.
我校共有303人，排成三路纵队，每两个人之间有0.5m，从队头上到桥的队尾离桥共用4分钟，每分钟队伍行200m，求桥长．
<gadget id="calculator">200 * 4</gadget>
<output>800</output>

<gadget id="calculator">303 / 3</gadget>
<output>101</output>

<gadget id="calculator">101 - 1</gadget>
<output>100</output>

<gadget id="calculator">100 * 0.5</gadget>
<output>50</output>

<gadget id="calculator">800 - 50</gadget>
<output>750</output>

<result>750</result>