A trapezoidal vegetable field has an upper base of 18m, a lower base of 32m, and a height of 12m. If every m**2 can harvest 3.5kg of rapeseed, how many kg of rapeseed can this plot harvest in total?
一块梯形菜地，上底18m，下底32m，高12m，如果每m**2可收油菜3.5kg，这块地一共可收油菜多少kg？
<gadget id="calculator">18 + 32</gadget>
<output>50</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">50 * 6 * 3.5</gadget>
<output>1_050</output>

<result>1_050</result>