The fraction ((b)/(a)) is recorded as a/b in the printing plate, and the symbol "/" was proposed by De Morgan, a British mathematician in the 19th century, in 1845. De Morgan was a man who was optimistic by nature, loved life, and liked to guess riddles. He died at the age of 65. Whenever someone asked him his age or birth, he often replied wittily: "I was x years old in x**2 years!" Judging from this, how old was he born?
分数((b)/(a))在印刷制版中记为a/b，符号"/"是19世纪英国数学家德•摩根在1845年提出的．德•摩根是一个生性乐观，热爱生活，嗜好猜谜的人，享年65岁，每当有人问他年龄或出生时，他常风趣地答道："我在x**2年是x岁！"由此判断，他出生在多少年．
<gadget id="calculator">43 ** 2</gadget>
<output>1_849</output>

<gadget id="calculator">1_849 - 43</gadget>
<output>1_806</output>

<result>1_806</result>