If a triangle and a parallelogram have the same base and height, and the area of the triangle is 1 square decimeter, what is the area of the parallelogram in square decimeters?
一个三角形和平行四边形等底等高，三角形面积是1平方分米，那么平行四边形面积是多少平方分米．
<gadget id="calculator">1 * 2</gadget>
<output>2</output>

<result>2</result>