There is a trapezoidal wheat field with an upper base of 28m, a lower base of 32m and a height of 20m. A total of 301.2 kilograms of wheat is harvested in this field. How many kilograms of wheat are harvested on average per square meter?
有一块梯形麦田，上底28m，下底32m，高20m．在这块田里共收小麦301.2千克，平均每方米收小麦多少千克？
<gadget id="calculator">28 + 32</gadget>
<output>60</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">60 * 10</gadget>
<output>600</output>

<gadget id="calculator">301.2 / 600</gadget>
<output>0.502</output>

<result>0.502</result>