There is a trapezoidal wheat field with an upper base of 13 meters, a lower base of 15 meters, and a height of 6 meters. A total of 1050 kilograms of wheat is harvested. How many kilograms are harvested on average per square meter of wheat field?
有一块梯形的麦田，上底13米，下底15米，高6米，共收小麦1050千克，平均每平方米麦田收获多少千克？
<gadget id="calculator">13 + 15</gadget>
<output>28</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">28 * 3</gadget>
<output>84</output>

<gadget id="calculator">1_050 / 84</gadget>
<output>25/2 = around 12.5</output>

<result>25/2 = around 12.5</result>