1. The problem is to multiply 0.5 by 58.5. 2. The multiplication formula is straightforward: $a \times b = c$ where $a=0.5$ and $b=58.5$. 3. Multiply the numbers: $0.5 \times 58.5 = 29.25$. 4. Explanation: Multiplying by 0.5 is the same as dividing by 2, so half of 58.5 is 29.25. 5. Therefore, the final answer is $29.25$.