Use PEMDAS
First here's the expression written out a little clearer

Parentheses: (2+8) = (10).
Exponents: 10^2 is 100, and
is

Multiplication and division: 4 * 1/16 is
or
simplified
Addition and subtraction: Go left to right. 3 + 100 +
= 103.25 (final answer)