A parallelogram and a triangle have the same base and height, and the sum of their areas is 36 square centimeters, what is the area of the triangle in square centimeters?
一个平行四边形和一个三角形等底等高，它们的面积之和是36平方厘米，那么三角形有面积是多少平方厘米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">36 * (1/3)</gadget>
<output>12</output>

<result>12</result>