triangle with an area of 28.8dm**2, one of the bases is 9dm long, what is the height of the base in decimeters? (solution by equation)
一个面积是28.8dm**2的三角形，其中一条底边长9dm，这条底边上的高是多少分米？(用方程解)
<gadget id="calculator">28.8 * 2</gadget>
<output>57.6</output>

<gadget id="calculator">57.6 / 9</gadget>
<output>6.4</output>

<result>6.4</result>