A number that is a multiple of 4 is also a multiple of 6 or a multiple of 7. What is the smallest number?
一个数是4的倍数，也是6的倍数，还是7的倍数．这个数最小是多少？
<gadget id="calculator">2 * 2 * 3 * 7</gadget>
<output>84</output>

<result>84</result>