To determine how many times Joslani needs to fill his \( \frac{1}{8} \) teaspoon measuring spoon to get a total of 58 teaspoons, we can set up the following equation:
- Calculate how many \( \frac{1}{8} \) teaspoons are in 58 teaspoons:
\[ \text{Number of } \frac{1}{8} \text{ teaspoons} = 58 \div \left(\frac{1}{8}\right) = 58 \times 8 = 464 \]
Joslani will need to fill his \( \frac{1}{8} \) teaspoon measuring spoon 464 times to have enough coloring to follow the recipe.