There is a parallelogram with a base of 4.5 meters and a height of 1.5 meters. What is its area in square meters?
有一个平行四边形，底是4.5米，比高多1.5米，它的面积是多少平方米？
<gadget id="calculator">4.5 - 1.5</gadget>
<output>3</output>

<gadget id="calculator">4.5 * 3</gadget>
<output>13.5</output>

<result>13.5</result>