The area of a parallelogram is 6.4 square meters, the height is 2 meters, and the base is in meters.
一个平行四边形的面积是6.4平方米，高是2米，底是多少米．
<gadget id="calculator">6.4 / 2</gadget>
<output>3.2</output>

<result>3.2</result>