The cube root of 5,219 is an irrational number, so it's
not possible to write it down exactly with digits. As a
decimal, it never ends or repeats, and as a fraction,
it can't be written at all.
It starts out 17.345857... and it keeps going forever.
The more decimal places you write, the closer you get
to the real thing, but it can never be written exactly.
