A parallelogram has an area of 36 square centimeters and a height of 4 centimeters. What is its base in centimeters.
一个平行四边形的面积是36平方厘米，高是4厘米．它的底是多少厘米．
<gadget id="calculator">36 / 4</gadget>
<output>9</output>

<result>9</result>