The lower base of a trapezoid is 1.6 times the upper base, extending the upper base by 9 cm. It becomes a parallelogram with an area of 288cm**2, how many square centimeters does the area increase?
一个梯形的下底是上底的1.6倍，把上底延长9cm．变成一个面积是288cm**2的平行四边形，面积增加了多少平方厘米？
<gadget id="calculator">1.6 - 1</gadget>
<output>0.6</output>

<gadget id="calculator">9 / 0.6</gadget>
<output>15</output>

<gadget id="calculator">15 + 9</gadget>
<output>24</output>

<gadget id="calculator">288 / 24</gadget>
<output>12</output>

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

<gadget id="calculator">9 * 6</gadget>
<output>54</output>

<result>54</result>