1. The problem is to multiply 12.23 by 5.63. 2. The formula for multiplication is simply $a \times b$ where $a=12.23$ and $b=5.63$. 3. Multiply the numbers: $$12.23 \times 5.63 = 68.8649$$ 4. So, the product of 12.23 and 5.63 is 68.8649. This means if you have 12.23 groups of 5.63 items each, you have a total of 68.8649 items.