Alright, let's work through 42638842 times 72193843 step by step
42638842 × 72193843 = 72193843 × (42638842)
+ 72193843 × 2 which equals 144387686
+ 72193843 × 40 giving us 2887753720
+ 72193843 × 800 which equals 57755074400
+ 72193843 × 8000 resulting in 577550744000
+ 72193843 × 30000 that equals 2165815290000
+ 72193843 × 600000 yielding 43316305800000
+ 72193843 × 2000000 which equals 144387686000000
+ 72193843 × 40000000 that is equal 2887753720000000

= 3078261865049806
