Alright, let's work through 18123604 times 15876085 step by step
18123604 × 15876085 = 15876085 × (18123604)
+ 15876085 × 4 that results in 63504340
+ 15876085 × 00 which equals 0
+ 15876085 × 600 that equals 9525651000
+ 15876085 × 3000 that results in 47628255000
+ 15876085 × 20000 that equals 317521700000
+ 15876085 × 100000 giving us 1587608500000
+ 15876085 × 8000000 producing 127008680000000
+ 15876085 × 10000000 giving us 158760850000000

= 287731877610340
