Alright, let's work through 4780 times 7589 step by step
4780 × 7589 = 7589 × (4780)
+ 7589 × 0 what gives us 0
+ 7589 × 80 that equals 607120
+ 7589 × 700 which equals 5312300
+ 7589 × 4000 giving us 30356000

= 36275420
