Alright, let's work through 42120694 times 73724753 step by step
42120694 × 73724753 = 73724753 × (42120694)
+ 73724753 × 4 yielding 294899012
+ 73724753 × 90 that equals 6635227770
+ 73724753 × 600 that results in 44234851800
+ 73724753 × 0000 what gives us 0
+ 73724753 × 20000 which equals 1474495060000
+ 73724753 × 100000 which equals 7372475300000
+ 73724753 × 2000000 yielding 147449506000000
+ 73724753 × 40000000 what gives us 2948990120000000

= 3105337761338582
