The circular runway of the stadium is 400 meters long. Xiaogang and Xiaohua start running in opposite directions on the same starting line of the runway. Xiaogang runs 152 meters per minute, and Xiaohua runs 148 meters per minute. How many minutes later they met for the third time.
体育场的环形跑道长400米，小刚和小华在跑道的同一起跑线上，同时向相反方向起跑，小刚每分钟跑152米，小华每分钟跑148米．多少分钟后他们第3次相遇．
<gadget id="calculator">400 * 3</gadget>
<output>1_200</output>

<gadget id="calculator">152 + 148</gadget>
<output>300</output>

<gadget id="calculator">1_200 / 300</gadget>
<output>4</output>

<result>4</result>