Uncle Wang planned to open up a trapezoidal vegetable field with an upper base of 10 meters and a lower base of 24 meters in a piece of wasteland. Later, in practice, the lower base was reduced by 8 meters, while the upper base and height remained unchanged. The resulting area was 84 meters smaller than the plan. Square meters, how many square meters is the trapezoidal vegetable plot actually opened by Uncle Wang?
王大伯计划在一片荒地上开辟一块上底是10米，下底24米的梯形菜地，后来实际操作中下底减少了8米，而上底和高没有变化，结果面积比计划减少了84平方米，王大伯实际开辟的梯形菜地的面积是多少平方米？
<gadget id="calculator">24 - 8</gadget>
<output>16</output>

<gadget id="calculator">10 + 16</gadget>
<output>26</output>

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

<gadget id="calculator">26 * 6</gadget>
<output>156</output>

<result>156</result>