248 young pioneers lined up in two columns to visit the science and technology exhibition. The speed of the team was 28 meters per minute, and the distance between the front and back was 1 meter. Now the team had to pass through a 45-meter-long underground passage. How many minutes does it take to leave the channel?
少先队员248人排成两路纵队去参观科技展览，队伍行进的速度是每分钟28米，前后两人都相距1米，现在队伍要通过一座长45米的地下通道，整个队伍从进通道到离开通道需几分钟？
<gadget id="calculator">248 / 2</gadget>
<output>124</output>

<gadget id="calculator">124 - 1</gadget>
<output>123</output>

<gadget id="calculator">1 * 123</gadget>
<output>123</output>

<gadget id="calculator">123 + 45</gadget>
<output>168</output>

<gadget id="calculator">168 / 28</gadget>
<output>6</output>

<result>6</result>