242 people are lined up in two columns, the distance between the two adjacent rows is 0.5 meters, and the team walks 65 meters per minute. Now you have to cross a bridge that is 850 meters long. How many minutes will it take from when the first two people get on the bridge to when the last two people leave the bridge?
242人排成两路纵队，相邻的前后两排相距0.5米，队伍每分钟走65米．现在要过一座长850米的大桥，从排头两人上桥到排尾两人离开桥，共需多少分钟？
<gadget id="calculator">242 / 2</gadget>
<output>121</output>

<gadget id="calculator">121 - 1</gadget>
<output>120</output>

<gadget id="calculator">0.5 * 120</gadget>
<output>60</output>

<gadget id="calculator">60 + 850</gadget>
<output>910</output>

<gadget id="calculator">910 / 65</gadget>
<output>14</output>

<result>14</result>