If the base of a parallelogram is increased by 20%, the height is 1.3 times the original, how much is the area increased?
一个平行四边形底增加20%，高是原来的1.3倍，面积增加了多少
<gadget id="calculator">1.56 - 1</gadget>
<output>0.56</output>

<result>0.56</result>