The volume stays the same. Find the original volume, then divide by the new base area.<br><br>
&bull; Original volume = 12 × 8 × 36 = 3456 cm&sup3;<br>
&bull; New length = 12 × 2 = 24 cm<br>
&bull; New width = 8 × 3 = 24 cm<br>
&bull; New base area = 24 × 24 = 576 cm&sup2;<br>
&bull; New height = 3456 ÷ 576 = 6 cm<br><br>
Final Answer: 6 cm