If the area of a triangle is 5.8 square centimeters, what is the area of a parallelogram with the same base and height as the triangle?
一个三角形的面积是5.8平方厘米，与这个三角形等底等高的平行四边形的面积是多少平方厘米．
<gadget id="calculator">5.8 * 2</gadget>
<output>11.6</output>

<result>11.6</result>