Under the conditions of artificial breeding, the life span of goldfish can reach 30 years, which is equivalent to (6/11) of eel. What is the lifespan of an eel? (Write out the quantitative relationship first, then answer)
在人工饲养的条件下，金鱼的寿命可达30年，相当于鳗鱼的(6/11)．鳗鱼的寿命是多少年？(先写出数量关系式，在解答)
<gadget id="calculator">6 / 11</gadget>
<output>6/11 = around 0.545455</output>

<gadget id="calculator">30 / (6/11)</gadget>
<output>55</output>

<result>55</result>