1. The problem is to find the result of multiplying 39.3 by 2.1 and then subtracting 18.5. 2. First, multiply 39.3 by 2.1: $$ 39.3 \times 2.1 = 39.3 \times (2 + 0.1) = 39.3 \times 2 + 39.3 \times 0.1 = 78.6 + 3.93 = 82.53 $$ 3. Next, subtract 18.5 from the result: $$ 82.53 - 18.5 = 64.03 $$ 4. Therefore, the final answer is: $$ \boxed{64.03} $$