If the area of a parallelogram is 7 square centimeters, what is the area of a triangle with the same base and height?
平行四边形面积是7平方厘米，与它等底等高的三角形的面积是多少．
<gadget id="calculator">7 / 2</gadget>
<output>7/2 = around 3.5</output>

<result>7/2 = around 3.5</result>