The base of a triangle is (4/5) decimeters, and the area is 3 square decimeters. What is the height of this triangle?
一个三角形的底是(4/5)分米，面积是3平方分米，这个三角形的高是多少分米．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">2 / (4/5)</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">3 * (5/2)</gadget>
<output>15/2 = around 7.5</output>

<result>15/2 = around 7.5</result>