If the base of a parallelogram is 6 cm long and its height is twice as high, what is its area in square centimeters?
一个平行四边形的底长6厘米，高是它的2倍，它的面积是多少平方厘米．
<gadget id="calculator">6 * 6 * 2</gadget>
<output>72</output>

<result>72</result>