A natural number, which is divisible by both 12 and 15, what is the minimum number of this number.
一个自然数，它既能被12整除，又能被15整除，这个数最小应是多少．
<gadget id="calculator">2 * 2 * 3 * 5</gadget>
<output>60</output>

<result>60</result>