Alright, let's work through 84358729 times 58574533 step by step
84358729 × 58574533 = 58574533 × (84358729)
+ 58574533 × 9 what gives us 527170797
+ 58574533 × 20 producing 1171490660
+ 58574533 × 700 giving us 41002173100
+ 58574533 × 8000 which equals 468596264000
+ 58574533 × 50000 that is equal 2928726650000
+ 58574533 × 300000 that results in 17572359900000
+ 58574533 × 4000000 producing 234298132000000
+ 58574533 × 80000000 producing 4685962640000000

= 4941273155648557
