The greatest common divisor of two natural numbers is 6, and the least common multiple is 72. If one of the natural numbers is known to be 18, find the other natural number.
两个自然数的最大公约数是6，最小公倍数是72，已知其中一个自然数是18，求另一个自然数．
<gadget id="calculator">72 / 18</gadget>
<output>4</output>

<gadget id="calculator">4 * 6</gadget>
<output>24</output>

<result>24</result>