The recipe for a cake that serves four people requires 2 eggs.
Tyler wants to make a cake for eight people, so he needs to double the recipe.
Doubling the recipe means he will need 2 eggs x 2 = 4 eggs.
Tyler currently has 3 eggs in the fridge, so he needs 4 - 3 = 1 additional egg.
Tyler needs to purchase 1 additional egg.
#### 1
The answer is: 1
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
If the recipe for a cake that serves four people requires 2 eggs and 4 cups of milk, and Tyler wants to make a cake for eight people, and he currently has 3 eggs in the fridge, how many additional eggs does Tyler need to purchase?

### Answer:
