The three side lengths of a triangle are three consecutive even numbers of two digits, and the sum of their last digits is divisible by 7. What is the maximum perimeter of this triangle?
一个三角形的三条边长是三个两位的连续偶数，它们的末位数字和能被7整除，这个三角形的最大周长等于多少．
<gadget id="calculator">86 + 88 + 90</gadget>
<output>264</output>

<result>264</result>