The math being shown is not the math being calculated.
For example, (9 + 3 + 3 + 3) x 2 x 2 x 2 x 2 x 2 would mathematically simplify down to 18 x 32 = 576
What is being calculated instead is that same equation simplifying down to 18 x 10 = 180, which means the multipliers are adding together, not multiplying. The correct way to write the equation being performed would be (9 + 3 + 3 + 3) x (2 + 2 + 2 + 2 + 2) = 18 x 10 = 180