Alright, let's work through 5487 times 7704 step by step
5487 × 7704 = 7704 × (5487)
+ 7704 × 7 which equals 53928
+ 7704 × 80 resulting in 616320
+ 7704 × 400 that equals 3081600
+ 7704 × 5000 giving us 38520000

= 42271848
