Final answer:
To calculate the total strength of the Allied forces on D-Day, multiply the number of divisions by the positive and negative factors affecting the Allies. The final answer is 1,716.
Step-by-step explanation:
To calculate the effects of force multiplication on D-Day, start with the number of Allied divisions landing in Normandy that day - 11. Then, multiply by the factors affecting the Allies: Deception - 3, Air Superiority - 4, Airborne Operations - 2, Heavy German Fortifications - (-13), Bad Weather - (-12).
11 x (3 x 4 x 2 x (-13) x (-12)) = 11 x (-13 x (-12)) = 11 x 156 = 1,716
Therefore, the final total strength of the Allied forces is 1,716.