The area of a triangle is 20 square decimeters and one base is 10 decimeters. What is the height of this base in decimeters.
一个三角形的面积是20平方分米，一条底边是10分米．这条底边上的高是多少分米．
<gadget id="calculator">2 / 10</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">20 * (1/5)</gadget>
<output>4</output>

<result>4</result>