The sixth grade students of the Experimental Primary School went to visit the Science and Technology Museum. 400 people lined up in two columns. The distance between two adjacent rows was 1 meter. The team walked 60 meters per minute. How many minutes will it take from the bridge to the last row to leave the bridge?
实验小学六年级学生去参观科技馆，400人排成两路纵队，相邻两排之间相距1米，队伍每分钟走60米，现在要过一座长41米的桥，从第一排上桥到最后一排离开桥，一共要多少分钟？
<gadget id="calculator">400 / 2</gadget>
<output>200</output>

<gadget id="calculator">200 - 1</gadget>
<output>199</output>

<gadget id="calculator">199 * 1</gadget>
<output>199</output>

<gadget id="calculator">199 + 41</gadget>
<output>240</output>

<gadget id="calculator">240 / 60</gadget>
<output>4</output>

<result>4</result>