A trapezoidal decorative board has an upper base of 6 decimeters, a lower base of 10 decimeters, and a height of 1 meter. Both sides must be painted with paint. What is the painted area in square decimeters?
一个梯形装饰板，上底是6分米，下底是10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">1 * 10</gadget>
<output>10</output>

<gadget id="calculator">6 + 10</gadget>
<output>16</output>

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

<gadget id="calculator">16 * 1 * 5 * 2</gadget>
<output>160</output>

<result>160</result>