A newly dug canal has a trapezoidal cross section, 3.2 meters wide at the mouth, 1.6 meters wide at the bottom, and 1.4 meters deep. What is the area of its cross section in square meters?
一条新挖的水渠，横截面是梯形，渠口宽3.2米，渠底宽1.6米，渠深1.4米，它的横截面的面积是多少平方米？
<gadget id="calculator">3.2 + 1.6</gadget>
<output>4.8</output>

<gadget id="calculator">1.4 / 2</gadget>
<output>0.7</output>

<gadget id="calculator">4.8 * 0.7</gadget>
<output>3.36</output>

<result>3.36</result>