Xiao Ming's celery field is trapezoidal, the upper base is 6 meters, the lower base is 10 meters, and the height is 8 meters. A total of 704 kg of celery was collected. Calculate how many kilograms of celery are collected on average per square meter?
小明家的芹菜地是梯形的，上底是6米，下底是10米，高是8米．共收芹菜704千克．算一算平均每平方米收芹菜多少千克？
<gadget id="calculator">6 + 10</gadget>
<output>16</output>

<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">16 * 4</gadget>
<output>64</output>

<gadget id="calculator">704 / 64</gadget>
<output>11</output>

<result>11</result>