Xiao Ming walks 30 meters per minute from home to school, and can arrive at school in 45 minutes. If he can arrive at school 30 minutes earlier by bicycle, how many meters per minute can Xiao Ming ride a bicycle?
小明从家到学校步行每分钟走30米，45分钟可以到学校，如果骑自行车可以提前30分钟到校，小明骑自行车每分钟能骑多少米？
<gadget id="calculator">30 * 45</gadget>
<output>1_350</output>

<gadget id="calculator">45 - 30</gadget>
<output>15</output>

<gadget id="calculator">1_350 / 15</gadget>
<output>90</output>

<result>90</result>