There are such natural numbers: adding 1 is a multiple of 2, adding 2 is a multiple of 3, adding 3 is a multiple of 4, adding 4 is a multiple of 5, adding 5 is a multiple of 6, adding 6 is a multiple of 7, What is the smallest of these natural numbers other than 1?
这样的自然数是有的：它加1是2的倍数，加2是3的倍数，加3是4的倍数，加4是5的倍数，加5是6的倍数，加6是7的倍数，在这种自然数中除了1以外最小的是多少．
<gadget id="calculator">2 * 6 * 5 * 7</gadget>
<output>420</output>

<gadget id="calculator">420 + 1</gadget>
<output>421</output>

<result>421</result>