The three sides of a triangle are three consecutive two-digit even numbers, and the sum of their mantissas is divisible by 7. What is the minimum perimeter of this triangle.
一个三角形的三条边是三个连续的两位偶数，且它们的尾数之和能被7整除．这个三角形的最小周长是多少．
<gadget id="calculator">16 + 18 + 20</gadget>
<output>54</output>

<result>54</result>