\( \frac{3}{10} \) of a number = 59.4. The number is the whole.

• \( \frac{3}{10} \times \text{number} = 59.4 \)
• \( \text{number} = 59.4 \div \frac{3}{10} = 59.4 \times \frac{10}{3} \)
• \( 59.4 \times 10 = 594 \)
• \( 594 \div 3 = 198 \)

Final Answer: 198