Xiao Ming went to the swimming pool to swim. It took him 6 minutes to swim 2 back and forth. He swam a total of 120 meters. How many meters per minute on average?
小明去游泳池游泳，他用了6分钟游了2个来回，共游了120米，平均每分钟游多少米？
<gadget id="calculator">120 / 6</gadget>
<output>20</output>

<result>20</result>