1. The problem is to multiply 27 by 33. 2. The formula for multiplication is $a \times b = c$, where $a$ and $b$ are numbers and $c$ is the product. 3. Multiply 27 by 33: $$27 \times 33$$ 4. Break down 33 as $30 + 3$ to simplify: $$27 \times (30 + 3) = 27 \times 30 + 27 \times 3$$ 5. Calculate each term: $$27 \times 30 = 810$$ $$27 \times 3 = 81$$ 6. Add the results: $$810 + 81 = 891$$ 7. Therefore, the product of 27 and 33 is $891$.