A number is divisible by 2, has a divisor of 3, and is a multiple of 5. What is the smallest number?
一个数既能被2整除，又有约数3，又是5的倍数，这个数最小是多少．
<gadget id="calculator">2 * 3 * 5</gadget>
<output>30</output>

<result>30</result>