Alright, let's work through 54020181 times 61332103 step by step
54020181 × 61332103 = 61332103 × (54020181)
+ 61332103 × 1 that is equal 61332103
+ 61332103 × 80 resulting in 4906568240
+ 61332103 × 100 yielding 6133210300
+ 61332103 × 0000 which equals 0
+ 61332103 × 20000 producing 1226642060000
+ 61332103 × 000000 what gives us 0
+ 61332103 × 4000000 yielding 245328412000000
+ 61332103 × 50000000 yielding 3066605150000000

= 3313171305170643
