Two identical triangles can be used to form a parallelogram. It is known that the area of the assembled parallelogram is 200 square centimeters, what is the area of the original triangle?
用两个完全一样的三角形可以拼成一个平行四边形．已知拼成的平行四边形的面积是200平方厘米，原来一个三角形的面积是多少平方分米．
<gadget id="calculator">200 / 2</gadget>
<output>100</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<result>1</result>