A piece of parallelogram land has an area of 54m**2. It is known that its base is 9m long and its height is m.
一块平行四边形的地，面积是54m**2，已知它的底长9m，高是多少m．
<gadget id="calculator">54 / 9</gadget>
<output>6</output>

<result>6</result>