Xiao Ming and Xiao Fang are running around a pond. They start from the same point and walk in the same direction. Xiao Ming: 280 m/min; Xiao Fang: 220 m/min. After 8 minutes, Xiao Ming caught up with Xiao Fang. How many meters is the circumference of this pond?
小明和小芳围绕着一个池塘跑步，两人从同一点出发，同向而行．小明：280米/分；小芳：220米/分．8分后，小明追上小芳．这个池塘的一周有多少米？
<gadget id="calculator">280 - 220</gadget>
<output>60</output>

<gadget id="calculator">60 * 8</gadget>
<output>480</output>

<result>480</result>