3 students and a teacher went to the orchard to pick fruit together. They picked a total of 144 kilograms of fruit in 3 hours. How many kilograms of fruit did each person pick per hour on average?
有3名学生和一位老师一起去果园摘水果，3小时一共摘了144千克水果，平均每个人每小时摘多少千克水果？
<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">144 / 3 / 4</gadget>
<output>12</output>

<result>12</result>