The upper base of a trapezoid is 3.8 meters, the lower base is 45.4 meters, and the height is 2.5 meters. What is the area of the trapezoid in square meters?
一个梯形的上底是3.8米，下底是45.4米，高是2.5米，这个梯形的面积是多少平方米．
<gadget id="calculator">3.8 + 45.4</gadget>
<output>49.2</output>

<gadget id="calculator">2.5 / 2</gadget>
<output>1.25</output>

<gadget id="calculator">49.2 * 1.25</gadget>
<output>61.5</output>

<result>61.5</result>