Starting from home, Wen Wen went uphill for 5 minutes, with an average of 45 meters per minute; then went downhill for 4 minutes, with an average of 63 meters per minute, to reach the Pleasure Palace. On average, how many meters per minute does Wenwen walk from home to the amusement palace?
文文从家出发，先上坡用了5分钟，平均每分钟走45米；又下坡用了4分钟，平均每分钟走63米，到达游乐宫．文文从家到游乐宫平均每分钟走多少米？
<gadget id="calculator">45 * 5</gadget>
<output>225</output>

<gadget id="calculator">63 * 4</gadget>
<output>252</output>

<gadget id="calculator">225 + 252</gadget>
<output>477</output>

<gadget id="calculator">5 + 4</gadget>
<output>9</output>

<gadget id="calculator">477 / 9</gadget>
<output>53</output>

<result>53</result>