The distance between Xiaoqiang and Xiaogang is 360 meters. On Saturday Xiaoqiang set off from home to play with Xiaogang. Two minutes after Xiaoqiang left, Xiaogang also set off from home to play with Xiaoqiang. It is known that Xiaoqiang walks 40 meters per minute, and Xiaogang walks 30 meters per minute. How many minutes will it take for the two to meet each other?
小强和小刚两家相距360米，星期六小强从家里出发去找小刚玩，在小强出发2分钟后，小刚也从家里出发去找小强玩．已知小强每分钟行40米，小刚每分钟行30米，又经过多少分钟两人相遇？
<gadget id="calculator">40 * 2</gadget>
<output>80</output>

<gadget id="calculator">360 - 80</gadget>
<output>280</output>

<gadget id="calculator">40 + 30</gadget>
<output>70</output>

<gadget id="calculator">280 / 70</gadget>
<output>4</output>

<result>4</result>