Alright, let's work through 73741681 times 90361899 step by step
73741681 × 90361899 = 90361899 × (73741681)
+ 90361899 × 1 that is equal 90361899
+ 90361899 × 80 that results in 7228951920
+ 90361899 × 600 that is equal 54217139400
+ 90361899 × 1000 that equals 90361899000
+ 90361899 × 40000 yielding 3614475960000
+ 90361899 × 700000 that is equal 63253329300000
+ 90361899 × 3000000 resulting in 271085697000000
+ 90361899 × 70000000 yielding 6325332930000000

= 6663438330612219
