1. The problem is to multiply 56 by 90. 2. Write the multiplication as $56 \times 90$. 3. Multiply 56 by 9 first: $56 \times 9 = 504$. 4. Since 90 is $9 \times 10$, multiply 504 by 10: $504 \times 10 = 5040$. 5. Therefore, $56 \times 90 = 5040$. Final answer: $5040$