To find the total amount of chicken broth used in the recipe, you need to multiply the number of boxes of chicken broth by the fluid ounces in each box.
Given:
- Number of boxes = 3
- Fluid ounces per box = 15.8
Calculating the total fluid ounces:
\[ \text{Total fluid ounces} = \text{Number of boxes} \times \text{Fluid ounces per box} \]
\[ \text{Total fluid ounces} = 3 \times 15.8 \]
\[ \text{Total fluid ounces} = 47.4 \]
Therefore, the recipe uses a total of 47.4 fluid ounces of chicken broth.