There is a circular pool in the park. Grandpa Wang jogs around the pool 12 times every morning. If the diameter of the circular pool is 40m, how many meters does Grandpa Wang run every morning?
公园里有一个圆形水池，王爷爷每天早晨绕着水池慢跑12圈，如果圆形水池的直径是40m，王爷爷每天早晨跑多少米？
<gadget id="calculator">3.14 * 40 * 12</gadget>
<output>1_507.2</output>

<result>1_507.2</result>