The area of a triangle is 6.28 square centimeters, what is the area of a parallelogram with the same base and height as it?
一个三角形的面积是6.28平方厘米，与它等底等高的平行四边形的面积是多少平方厘米．
<gadget id="calculator">6.28 * 2</gadget>
<output>12.56</output>

<result>12.56</result>