The area of a parallelogram is 90 square centimeters. Its base is 15 cm, what is its height? (Solution of column equation)
一个平行四边形的面积是90平方厘米．它的底是15厘米，高是多少厘米？(列方程解)
<gadget id="calculator">90 / 15</gadget>
<output>6</output>

<result>6</result>