The base of a triangle is 3cm, the height is 4cm, what is the area of a parallelogram with the same base and height in cm**2.
一个三角形的底是3cm，高是4cm，和它等底等高的平行四边形的面积是多少cm**2．
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">3 * 2 * 2</gadget>
<output>12</output>

<result>12</result>