1. The problem is to calculate the product of 0.65 and 100. 2. The formula for multiplication is $a \times b = c$, where $a$ and $b$ are numbers and $c$ is their product. 3. Multiply 0.65 by 100: $$0.65 \times 100 = 65$$ 4. Explanation: Multiplying by 100 shifts the decimal point two places to the right, so 0.65 becomes 65. 5. Therefore, the final answer is $65$.