The product of four consecutive natural numbers is 1680, what is their sum
四个连续自然数的积为1680，它们的和为多少
<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<gadget id="calculator">2 * 2 * 2</gadget>
<output>8</output>

<gadget id="calculator">5 + 6 + 7 + 8</gadget>
<output>26</output>

<result>26</result>