It takes Xiaohua 20 minutes to walk home from school, and 10 minutes to ride a bicycle home. Xiaohua walks 45 meters per minute on foot, how many meters per minute does he ride a bicycle?
小华从学校步行回家要20分，骑自行车回家要10分．小华步行每分走45米，他骑自行车每分行多少米？
<gadget id="calculator">20 / 10</gadget>
<output>2</output>

<gadget id="calculator">45 * 2</gadget>
<output>90</output>

<result>90</result>