A triangle and a parallelogram have the same base and have the same area. The height of the triangle is 7 cm. What is the height of the parallelogram?
一个三角形和一个平行四边形，底相同面积也相等，三角形的高是7厘米，平行四边形的高是多少．
<gadget id="calculator">7 / 2</gadget>
<output>7/2 = around 3.5</output>

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