The area of a triangle is 30 square decimeters, the height is 10 decimeters, and the base is how many decimeters.
一个三角形的面积是30平方分米，高是10分米，底是多少分米．
<gadget id="calculator">2 / 10</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">30 * (1/5)</gadget>
<output>6</output>

<result>6</result>