3998 is the sum of 4 consecutive natural numbers, what is the smallest number among them.
3998是4个连续自然数的和，其中最小的数是多少．
<gadget id="calculator">3_998 - 1 - 2 - 3</gadget>
<output>3_992</output>

<gadget id="calculator">1 + 1 + 1 + 1</gadget>
<output>4</output>

<gadget id="calculator">3_992 / 4</gadget>
<output>998</output>

<result>998</result>