If the base of a parallelogram is 3 cm and its height is 2.5 cm, what is its area in square centimeters?
一个平行四边形底边是3厘米，它的高是2.5厘米，它的面积是多少平方厘米．
<gadget id="calculator">3 * 2.5</gadget>
<output>7.5</output>

<result>7.5</result>