Group even columns 2, 4, 6, 8, 10, ... in the order of 3, 2, 3, 2, ... as follows: (2, 4, 6), (8, 10), (12, 14, 16), (18, 20), ..., what is the sum of the two numbers in the 16th and 17th groups.
把偶数列2，4，6，8，10，…按3个，2个，3个，2个，…的顺序分组如下：(2，4，6)，(8，10)，(12，14，16)，(18，20)，…，第16组，17组两组数的和是多少．
<gadget id="calculator">78 + 2</gadget>
<output>80</output>

<gadget id="calculator">78 + 80 + 82 + 84 + 86</gadget>
<output>410</output>

<result>410</result>