On the campus plan with a scale of 1:400, the base of a parallelogram garden is 4 cm, and the ratio of the base to its corresponding height is 2:1. What is the actual area of the parallelogram garden in square meters?
在比例尺是1：400的校园平面图上，量得一个平行四边形花园的底是4厘米，底与它对应的高的比是2：1，这个平行四边形花园的实际面积是多少平方米．
<gadget id="calculator">16 * 8</gadget>
<output>128</output>

<result>128</result>