The distance from Xiaohua’s home to the supermarket is 306 meters, and the distance from the supermarket to the station is 170 meters. Xiaohua starts from home, first goes to the supermarket, and then to the station. It takes 7 minutes in total. How many meters per minute on average?
从小华家到超市的路程是306米，从超市到车站的路程是170米，小华从家出发，先到超市，再到车站，一共走了7分钟，平均每分钟走多少米？
<gadget id="calculator">306 + 170</gadget>
<output>476</output>

<gadget id="calculator">476 / 7</gadget>
<output>68</output>

<result>68</result>