First part of an equation is start solving inside the Brackets. You need to do the operation inside the brackets first 3 2 then multiply the answer by 4. These letters stand for vinculum bracket of division multiplication addition and subtraction respectively.
Without this rule you could get different answers - so getting the order of operation correct is important.
The full form of BODMAS is Brackets Orders Division Multiplication Addition and Subtraction. 10 5 5. Starting with 5 1 6. In the above simplification we have both division and multiplication.