A trapezoidal decorative board, the upper base is 6 decimeters, the lower base is 8 decimeters, and the height is 1 meter. Both sides must be painted, how many square decimeters is the painted area?
一个梯形的装饰板，上底是6分米，下底是8分米，高是1米．两面都要涂油漆，涂油漆的面积是多少平方分米？
<gadget id="calculator">6 + 8</gadget>
<output>14</output>

<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">14 * 1 * 5 * 2</gadget>
<output>140</output>

<result>140</result>