Alright, let's work through 18072997 times 23138455 step by step
18072997 × 23138455 = 23138455 × (18072997)
+ 23138455 × 7 that equals 161969185
+ 23138455 × 90 producing 2082460950
+ 23138455 × 900 yielding 20824609500
+ 23138455 × 2000 what gives us 46276910000
+ 23138455 × 70000 producing 1619691850000
+ 23138455 × 000000 which equals 0
+ 23138455 × 8000000 that equals 185107640000000
+ 23138455 × 10000000 giving us 231384550000000

= 418181227799635
