From home to school, Xiao Ming walked 80 meters per minute for the first 4 minutes, and 90 meters per minute for the next 6 minutes. How many meters per minute on average?
小明从家到学校，前4分钟每分钟走80米，后6分钟每分钟走90米，平均每分钟走多少米？
<gadget id="calculator">4 * 80</gadget>
<output>320</output>

<gadget id="calculator">6 * 90</gadget>
<output>540</output>

<gadget id="calculator">320 + 540</gadget>
<output>860</output>

<gadget id="calculator">4 + 6</gadget>
<output>10</output>

<gadget id="calculator">860 / 10</gadget>
<output>86</output>

<result>86</result>