The base of a parallelogram is 4.2 cm and the height is 3 cm. What is the area of the parallelogram in square centimeters?
一个平行四边形的底是4.2厘米，高是3厘米，这个平行四边形的面积是多少平方厘米．
<gadget id="calculator">4.2 * 3</gadget>
<output>12.6</output>

<result>12.6</result>