The sum of 13 consecutive natural numbers is 247, what is the sum of the 13 consecutive natural numbers immediately following these 13 numbers?
13个连续自然数的和是247，紧接在这13个数后面的13个连续自然数的和等于多少．
<gadget id="calculator">13 * 13</gadget>
<output>169</output>

<gadget id="calculator">247 + 169</gadget>
<output>416</output>

<result>416</result>