Li Lingrui and Huang Kaipeng live on the same floor. When going to school, Li Lingrui walked 90 meters per minute and arrived at school in 8 minutes. Huang Kaipeng took an extra minute. How many meters did Huang Kaipeng walk per minute?
李铃瑞和黄凯鹏同住一层楼．上学时，李铃瑞每分钟走90米，8分钟到达学校，黄凯鹏多用1分钟，黄凯鹏每分钟走多少米？
<gadget id="calculator">90 * 8</gadget>
<output>720</output>

<gadget id="calculator">8 + 1</gadget>
<output>9</output>

<gadget id="calculator">720 / 9</gadget>
<output>80</output>

<result>80</result>