A parallelogram and a triangle have the same base and height, and the area is 15 square centimeters larger than the triangle. What is the area of the triangle in square centimeters?
一个平行四边形与一个三角形等底等高，且面积比三角形大15平方厘米，这个三角形的面积是多少平方厘米．
<gadget id="calculator">2 - 1</gadget>
<output>1</output>

<gadget id="calculator">15 / 1</gadget>
<output>15</output>

<result>15</result>