Alright, let's work through 1120 times 5578 step by step
1120 × 5578 = 5578 × (1120)
+ 5578 × 0 giving us 0
+ 5578 × 20 yielding 111560
+ 5578 × 100 that equals 557800
+ 5578 × 1000 that results in 5578000

= 6247360
