A triangle and a parallelogram have the same area and the same height. The base of the triangle is 6.4 cm, what is the base of the parallelogram?
一个三角形和一个平行四边形面积相等，高也相等．三角形的底是6.4厘米，平行四边形的底是多少．
<gadget id="calculator">6.4 / 2</gadget>
<output>3.2</output>

<result>3.2</result>