因为 {[(a^n1)^n2]...^nk }= a^(n1*2*...*nk)所以，码10层就等于 10^(10^10)即：1后面跟10^10个0(1后面跟100亿个0)
1后面跟一百个0即10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
10^10个0
en
