tractors cultivate 86.4 mu of land in 4 hours, how many mu of land is cultivated by each tractor per hour on average?
6台拖拉机4小时耕地86.4亩，平均每台拖拉机每小时耕地多少亩？
<gadget id="calculator">86.4 / 4 / 6</gadget>
<output>3.6</output>

<result>3.6</result>