If one side of a square is increased by 2 cm and its opposite side is reduced by 4 cm, the ratio of the upper base to the lower base of the resulting trapezoid is 7:4. What is the area of the trapezoid in square centimeters?
一个正方形的一边增加2厘米，它的对边减少4厘米，所得到的梯形的上底和下底的比是7：4，这个梯形的面积是多少平方厘米．
<gadget id="calculator">4 + 2</gadget>
<output>6</output>

<gadget id="calculator">7 - 4</gadget>
<output>3</output>

<gadget id="calculator">6 / 3</gadget>
<output>2</output>

<gadget id="calculator">2 * 7</gadget>
<output>14</output>

<gadget id="calculator">14 - 6</gadget>
<output>8</output>

<gadget id="calculator">14 + 8</gadget>
<output>22</output>

<gadget id="calculator">8 + 4</gadget>
<output>12</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">22 * 6</gadget>
<output>132</output>

<result>132</result>