Alright, let's work through 1638 times 567 step by step
1638 × 567 = 567 × (1638)
+ 567 × 8 resulting in 4536
+ 567 × 30 that equals 17010
+ 567 × 600 that equals 340200
+ 567 × 1000 which equals 567000

= 928746
