Alright, let's work through 42189438 times 28929309 step by step
42189438 × 28929309 = 28929309 × (42189438)
+ 28929309 × 8 resulting in 231434472
+ 28929309 × 30 what gives us 867879270
+ 28929309 × 400 resulting in 11571723600
+ 28929309 × 9000 that is equal 260363781000
+ 28929309 × 80000 producing 2314344720000
+ 28929309 × 100000 giving us 2892930900000
+ 28929309 × 2000000 resulting in 57858618000000
+ 28929309 × 40000000 that results in 1157172360000000

= 1220511288438342
