The hourglass is an ancient timekeeping tool. A square box-shaped hourglass has a side length of 12dm. It is known that the average sand leakage per hour is 72dm**3. According to this calculation, how many hours does a box of sand leak?
沙漏是古代的一种计时工具．一种正方体箱型沙漏的棱长是12dm，已知平均每小时漏沙72dm**3，照这样计算，多少小时漏光一箱沙？
<gadget id="calculator">12 / 72</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">12 * 12 * (1/6)</gadget>
<output>24</output>

<result>24</result>