If a parallelogram with an area of 12.6 square decimeters is to be cut to form a triangle with the same base and height, what is the area to be cut?
一个面积是12.6平方分米的平行四边形，要剪一个与它等底等高的三角形，剪去的面积是多少平方分米．
<gadget id="calculator">12.6 / 2</gadget>
<output>6.3</output>

<gadget id="calculator">12.6 - 6.3</gadget>
<output>6.3</output>

<result>6.3</result>