46 students from Class 5 and 1 lined up to go on an outing. The distance between the two people was 0.8 meters. After 4 minutes, they passed a 138-meter-long bridge. What is the average speed of the team?
五1班46名同学排成一队去郊游，前后两人之间相隔0.8米，经过4分钟的时间通过了一座138米长的大桥，队伍行进的平均速度是多少？
<gadget id="calculator">46 - 1</gadget>
<output>45</output>

<gadget id="calculator">0.8 * 45</gadget>
<output>36</output>

<gadget id="calculator">36 + 138</gadget>
<output>174</output>

<gadget id="calculator">174 / 4</gadget>
<output>87/2 = around 43.5</output>

<result>87/2 = around 43.5</result>