242 students in a certain school organized military training and lined up in two columns. The average distance between the two students in the front and back (including the positions occupied by each person) is 0.8 meters. How many minutes does it take from getting on the bridge to leaving the bridge at Paiwei?
某校242名学生组织军训，排成两路纵队，前后两位同学平均相距0.8米(包括每人所占位置)如果队伍每分钟前进40米，现要过一座长100米的桥，从排头上桥到排尾离桥共需多少分钟．
<gadget id="calculator">96 + 100</gadget>
<output>196</output>

<gadget id="calculator">196 / 40</gadget>
<output>49/10 = around 4.9</output>

<result>49/10 = around 4.9</result>