Wenwen arrived at the Fun Palace on Sunday. It took 7 minutes to go uphill, a total of 336 meters; 9 minutes to go downhill, an average of 64 meters per minute. How many meters does Wenwen walk on average per minute?
文文周日到游乐宫，上坡用了7分钟，共走了336米；下坡用了9分钟，平均每分钟走64米．文文平均每分钟走多少米？
<gadget id="calculator">64 * 9</gadget>
<output>576</output>

<gadget id="calculator">336 + 576</gadget>
<output>912</output>

<gadget id="calculator">7 + 9</gadget>
<output>16</output>

<gadget id="calculator">912 / 16</gadget>
<output>57</output>

<result>57</result>