It took Xiaohua 5 minutes to go uphill from home to the amusement palace, an average of 45 meters per minute, and 4 minutes to go downhill, a total of 252 meters. How many meters did Xiaohua walk from home to the amusement palace on average per minute?
小华从家到游乐宫去上坡用了5分钟，平均每分钟走45米，下坡用了4分钟，共走了252米，小华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">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>