The upper base of a trapezoidal steel plate is 6m, the lower base is 8m, and the height is 4m. The total amount of paint used to coat this steel plate is 28 kg. How many kg of paint is used on average per square meter?
一块梯形钢板的上底是6m，下底是8m，高是4m，涂这块钢板一共用油漆28千克，平均每平方米用多少千克油漆？
<gadget id="calculator">28 / 28</gadget>
<output>1</output>

<result>1</result>