Beibei practices swimming, the swimming lane is 25 meters long, and she insists on swimming 6 back and forth each time. How many meters do you swim each time?
贝贝练习游泳，泳道长25米，她每次坚持游6个来回．每次游多少米？
<gadget id="calculator">6 * 2</gadget>
<output>12</output>

<gadget id="calculator">25 * 12</gadget>
<output>300</output>

<result>300</result>