A person swims in the river. It takes 6 minutes to go from point A to point B, and 3 minutes to go from point B to point A. The speed of the water is known to be 30 meters per minute. Find the distance in meters from point A to point B.
某人在河中游泳，从A地到B地用了6分钟，从B地到A地用了3分钟，已知水流的速度为每分钟30米，求A地到B地多少米．
<gadget id="calculator">6 * 30</gadget>
<output>180</output>

<gadget id="calculator">3 * 30</gadget>
<output>90</output>

<gadget id="calculator">180 + 90</gadget>
<output>270</output>

<gadget id="calculator">6 - 3</gadget>
<output>3</output>

<gadget id="calculator">270 / 3</gadget>
<output>90</output>

<gadget id="calculator">90 - 30</gadget>
<output>60</output>

<gadget id="calculator">6 * 60</gadget>
<output>360</output>

<result>360</result>