A rectangular and a parallelogram vegetable field have the same area. The length and width of a rectangular vegetable field are 12.4 meters and 6 meters respectively. The base of the parallelogram vegetable field is 4 meters, what is its height in meters?
一块长方形和一块平行四边形的菜地，它们的面积相等．长方形菜地的长和宽分别是12.4米和6米．平行四边形菜地的底边是4米，它的高是多少米？
<gadget id="calculator">6 / 4</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">12.4 * (3/2)</gadget>
<output>18.6</output>

<result>18.6</result>