The upper base of a trapezoid is 4 decimeters, the lower base is 3.6 decimeters, and the height is 1.2 decimeters. What is its area in square decimeters?
一个梯形的上底4分米，下底3.6分米，高1.2分米，它的面积是多少平方分米．
<gadget id="calculator">4 + 3.6</gadget>
<output>7.6</output>

<gadget id="calculator">1.2 / 2</gadget>
<output>0.6</output>

<gadget id="calculator">7.6 * 0.6</gadget>
<output>4.56</output>

<result>4.56</result>