A parallelogram and a triangle have the same base and height. It is known that the area of the parallelogram is 12 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，已知平行四边形的面积是12平方厘米，三角形的面积是多少平方厘米．
<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<result>6</result>