The lower base of a right-angled trapezoid is 12 cm. If the upper base is increased by 2 cm, the trapezoid becomes a square. What is the area of the trapezoid in square centimeters?
一个直角梯形的下底12厘米，如果把它的上底增加2厘米，这个梯形就变成了一个正方形．原来这个梯形的面积是多少平方厘米．
<gadget id="calculator">12 - 2</gadget>
<output>10</output>

<gadget id="calculator">10 + 12</gadget>
<output>22</output>

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

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

<result>132</result>