D = (12) / (3)(4). Substitute the values of a, b, and c into the equation.
D = 4 * (4) : Use DMAS from left to right. Remember that DMAS means "from left to right, division *and* multiplication and then addition *and* subtraction," rather than "from left to right, division, *then* multiplication, *then* addition, *then* subtraction." It's an important difference.
D = 16
