Alright, let's work through 42143603 times 66298110 step by step
42143603 × 66298110 = 66298110 × (42143603)
+ 66298110 × 3 resulting in 198894330
+ 66298110 × 00 that equals 0
+ 66298110 × 600 resulting in 39778866000
+ 66298110 × 3000 resulting in 198894330000
+ 66298110 × 40000 which equals 2651924400000
+ 66298110 × 100000 producing 6629811000000
+ 66298110 × 2000000 giving us 132596220000000
+ 66298110 × 40000000 yielding 2651924400000000

= 2794041227490330
