The base of a parallelogram is 3.5 cm and the height is 1.4 times the base. What is its area in square centimeters?
平行四边形的底是3.5厘米，高是底的1.4倍，它的面积是多少平方厘米．
<gadget id="calculator">3.5 * 1.4 * 3.5</gadget>
<output>17.15</output>

<result>17.15</result>