Alright, let's work through 8640 times 5979 step by step
8640 × 5979 = 5979 × (8640)
+ 5979 × 0 that equals 0
+ 5979 × 40 yielding 239160
+ 5979 × 600 that is equal 3587400
+ 5979 × 8000 that equals 47832000

= 51658560
