Alright, let's work through 12378875 times 73073353 step by step
12378875 × 73073353 = 73073353 × (12378875)
+ 73073353 × 5 that equals 365366765
+ 73073353 × 70 that results in 5115134710
+ 73073353 × 800 giving us 58458682400
+ 73073353 × 8000 that equals 584586824000
+ 73073353 × 70000 giving us 5115134710000
+ 73073353 × 300000 that equals 21922005900000
+ 73073353 × 2000000 that is equal 146146706000000
+ 73073353 × 10000000 that is equal 730733530000000

= 904565902617875
