Alright, let's work through 16107475 times 63210645 step by step
16107475 × 63210645 = 63210645 × (16107475)
+ 63210645 × 5 yielding 316053225
+ 63210645 × 70 that results in 4424745150
+ 63210645 × 400 what gives us 25284258000
+ 63210645 × 7000 that results in 442474515000
+ 63210645 × 00000 resulting in 0
+ 63210645 × 100000 resulting in 6321064500000
+ 63210645 × 6000000 that is equal 379263870000000
+ 63210645 × 10000000 yielding 632106450000000

= 1018163884071375
