Two cylinders with the same base area, one with a height of 12 decimeters and a volume of 81 cubic decimeters, and the other with a height of 4 decimeters, what is the volume?
两个底面积相等的圆柱，一个圆柱的高为12分米，体积为81立方分米，另一个圆柱的高为4分米，体积是多少？
<gadget id="calculator">81 / 12</gadget>
<output>27/4 = around 6.75</output>

<gadget id="calculator">(27/4) * 4</gadget>
<output>27</output>

<result>27</result>