Find the number of digits in the square root of the following number:

$3915380329$

Find the number of digits in the square root of the following number:

$21206025$

Using the long division method, find the square root of $49284$.

Using the long division method, find the square root of $63001$.

Using the long division method, find the square root of $395641$.

Using the long division method, find the square root of $10310521$.

Using the long division method, find the square root of $99856$.

Using the long division method, find the square root of $525625$.

Using the long division method, find the square root of $994009$.