Alright, let's work through 16402418 times 4487689 step by step
16402418 × 4487689 = 4487689 × (16402418)
+ 4487689 × 8 resulting in 35901512
+ 4487689 × 10 yielding 44876890
+ 4487689 × 400 what gives us 1795075600
+ 4487689 × 2000 which equals 8975378000
+ 4487689 × 00000 that results in 0
+ 4487689 × 400000 that is equal 1795075600000
+ 4487689 × 6000000 which equals 26926134000000
+ 4487689 × 10000000 that equals 44876890000000

= 73608950832002
