2+2*2=?

First do what is inside the parentheses.

Then do multiplications and divisions, in order, from left to right.

Then do additions and subtractions, in order, from left to right.

2 + (2 * 2) - 6/25

Parentheses:     2 + 4 - 6/25

Division:           2 + 4 - 0.24

Additions and subtractions:     6 - 0.24  =  5.76