Both Xiao Gang and Xiao Ming ride bicycles to school. Xiao Ming rode 5,400 meters in 9 minutes, and Xiao Gang rode 6,300 meters in 10 minutes. Which of the two rode faster? How many meters per minute on average?
小刚和小明都骑自行车上学，小明9分钟骑了5400米，小刚10分钟骑了6300米，他们两个谁骑得快些？平均每分钟快多少米？
<gadget id="calculator">6_300 / 10</gadget>
<output>630</output>

<gadget id="calculator">5_400 / 9</gadget>
<output>600</output>

<gadget id="calculator">630 - 600</gadget>
<output>30</output>

<result>30</result>