1. The problem is to find the sum of 23 and 333. 2. The formula for addition is $a + b = c$, where $a$ and $b$ are the numbers to add, and $c$ is the result. 3. Substitute the values: $23 + 333$. 4. Add the numbers: $23 + 333 = 356$. 5. Therefore, the sum of 23 and 333 is 356.