The upper base of a trapezoid is (1/3) meters, the lower base is (7/9) meters, and the height is (3/5) meters. What is the area of this trapezoid in square meters?
一个梯形的上底是(1/3)米，下底是(7/9)米，高是(3/5)米，这个梯形的面积是多少平方米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">7 / 9</gadget>
<output>7/9 = around 0.777778</output>

<gadget id="calculator">(1/3) + (7/9)</gadget>
<output>10/9 = around 1.111111</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) / 2</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(10/9) * (3/10)</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>