The height of a trapezoid is 2 meters and the sum of the upper and lower bases is 3 meters. What is the area of the trapezoid?
一个梯形的高是2米，上下底的和是3米，这个梯形的面积是多少平方米．
<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">3 * 1</gadget>
<output>3</output>

<result>3</result>