Alright, let's work through 40638123 times 7551142 step by step
40638123 × 7551142 = 7551142 × (40638123)
+ 7551142 × 3 that is equal 22653426
+ 7551142 × 20 resulting in 151022840
+ 7551142 × 100 producing 755114200
+ 7551142 × 8000 giving us 60409136000
+ 7551142 × 30000 producing 226534260000
+ 7551142 × 600000 which equals 4530685200000
+ 7551142 × 0000000 giving us 0
+ 7551142 × 40000000 that equals 302045680000000

= 306864237386466
