Xiaoqiang walks 9 kilometers per hour from A to B. He first walks to B for 1 minute, then turns around and walks 3 minutes in the opposite direction, then turns around and walks 5 minutes, and then turns around and walks 7 minutes. In this order, if A and B The distance between the two places is 600 meters. How many minutes does it take for Xiaoqiang to reach B?
小强从甲地到乙地，每小时走9千米，他先向乙地走1分，又调头反向走3分又调头走5分，再调头走7分，依次下去，如果甲、乙两地相距600米，小强过多少分可到达乙地．
<gadget id="calculator">1 + 3 + 5 + 7 + 8</gadget>
<output>24</output>

<result>24</result>