Make a cuboid iron drum without a cover, with a total of 228 square decimeters of iron skin. It is known that the bottom of the drum is a square with a side length of 6 decimeters. What is the height of the drum?
做一个无盖的长方体铁桶，共有铁皮228平方分米，已知桶底是边长6分米的正方形，桶高是几分米？
<gadget id="calculator">6 * 6 * 2</gadget>
<output>72</output>

<gadget id="calculator">228 - 72</gadget>
<output>156</output>

<gadget id="calculator">156 / 4</gadget>
<output>39</output>

<gadget id="calculator">39 / 6</gadget>
<output>13/2 = around 6.5</output>

<result>13/2 = around 6.5</result>