1. **State the problem:** A dairy farm produced 692.8 gallons of milk and used 338.9 gallons to make cheese. We need to find how much milk is left. 2. **Formula used:** To find the remaining milk, subtract the amount used from the total produced. $$\text{Milk left} = \text{Total milk produced} - \text{Milk used}$$ 3. **Apply the values:** $$\text{Milk left} = 692.8 - 338.9$$ 4. **Calculate:** $$692.8 - 338.9 = 353.9$$ 5. **Answer:** The dairy farm has 353.9 gallons of milk left.