A total of 50 trees are planted around the playground of the school. The distance between two adjacent trees is 8 meters. How many meters is it to run around the playground?
学校圆形操场的周围共植树50棵，相邻两棵树之间的距离是8米，那么绕操场跑一圈是多少米．
<gadget id="calculator">8 * 50</gadget>
<output>400</output>

<result>400</result>