The area of a triangle is 4.5 square decimeters, the base is 5 decimeters, what is its height?
一个三角形的面积是4.5平方分米，底是5分米，它的高是多少分米？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">4.5 * (2/5)</gadget>
<output>1.8</output>

<result>1.8</result>