A positive integer multiplied by 2 is a perfect square, and multiplied by 3 is a perfect cube. What is the minimum number of this number?
一个正整数乘以2后是完全平方数，乘以3后是完全立方数，这个数最小是多少．
<gadget id="calculator">2 ** 3</gadget>
<output>8</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">8 * 9</gadget>
<output>72</output>

<result>72</result>