Alright, let's work through 19807431 times 75339120 step by step
19807431 × 75339120 = 75339120 × (19807431)
+ 75339120 × 1 yielding 75339120
+ 75339120 × 30 that equals 2260173600
+ 75339120 × 400 giving us 30135648000
+ 75339120 × 7000 which equals 527373840000
+ 75339120 × 00000 what gives us 0
+ 75339120 × 800000 that is equal 60271296000000
+ 75339120 × 9000000 resulting in 678052080000000
+ 75339120 × 10000000 giving us 753391200000000

= 1492274421000720
