Alright, let's work through 42384387 times 45446621 step by step
42384387 × 45446621 = 45446621 × (42384387)
+ 45446621 × 7 yielding 318126347
+ 45446621 × 80 resulting in 3635729680
+ 45446621 × 300 resulting in 13633986300
+ 45446621 × 4000 giving us 181786484000
+ 45446621 × 80000 resulting in 3635729680000
+ 45446621 × 300000 resulting in 13633986300000
+ 45446621 × 2000000 producing 90893242000000
+ 45446621 × 40000000 producing 1817864840000000

= 1926227172306327
