So squarish
Number Theory
Level
2
\[\large 2 \, 0 \, \boxed{\phantom0}\, \boxed{\phantom0}\, \boxed{\phantom0}\, 1 \, 6 \]
The above is a 7-digit integer that is also a perfect square, with three of its digits hidden.
Find the missing digits and submit your answer as this 3-digit integer.
by
André Hucek