Answer: 84 salads.
Step-by-step explanation: Assuming that this is Sequences, Probabilities, and Conics, then the number of salads that you can make with the ingredients is 84. Let's see why.
7*6*4*2 = 336, but you need four ingredients to make the salad, so 336/4 = 84, thus 84 salads you can make.