The product of the upper base and the height of a trapezoid is 44 square centimeters, and the product of the lower base and the height is 66 square centimeters. What is its area?
一个梯形上底与高的积是44平方厘米，下底与高的积是66平方厘米，它的面积是多少平方厘米．
<gadget id="calculator">44 + 66</gadget>
<output>110</output>

<gadget id="calculator">110 / 2</gadget>
<output>55</output>

<result>55</result>