3780 is the sum of five consecutive natural numbers, what is the smallest number among them?
3780是五个连续自然数的和，其中最小的数是多少．
<gadget id="calculator">3_780 / 5</gadget>
<output>756</output>

<gadget id="calculator">756 - 2</gadget>
<output>754</output>

<result>754</result>