Xiaotian and Xiaole were riding bicycles in the park. They set off from the east gate and west gate of the park at the same time and walked toward each other. After arriving at the west gate and east gate respectively, immediately go back the same way. It is known that Xiaotian's cycling speed is 5m/s, and Xiaole's cycling speed is 4m/s. Twenty minutes after departure, the two met face to face for the second time. How many meters is the distance from the east gate to the west gate of the park?
小天和小乐在公园里骑车，两人同时分别从公园的东门与西门出发，相向而行．分别到达西门与东门后立刻原路返回．已知小天骑车速度为5m/s，小乐骑车速度为4m/s．出发20分钟后，两人第二次迎面相遇．公园东门到西门的距离为多少米？
<gadget id="calculator">20 / 3</gadget>
<output>20/3 = around 6.666667</output>

<gadget id="calculator">9 * (20/3)</gadget>
<output>60</output>

<result>60</result>