A parallelogram has four sides with equal lengths of 5 cm and a height of 3 cm. What is the area of the parallelogram?
一个平行四边形四条边长度相等都是5厘米，高是3厘米，求这个平行四边形面积是多少？
<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<result>15</result>