The base of a triangle is 5 decimeters and the area is 30 square decimeters, what is the height of the triangle
一个三角形的底是5分米，面积是30平方分米，这个三角形的高是多少分米
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">30 * (2/5)</gadget>
<output>12</output>

<result>12</result>