Alright, let's work through 8380853 times 16104985 step by step
8380853 × 16104985 = 16104985 × (8380853)
+ 16104985 × 3 what gives us 48314955
+ 16104985 × 50 that results in 805249250
+ 16104985 × 800 resulting in 12883988000
+ 16104985 × 0000 resulting in 0
+ 16104985 × 80000 producing 1288398800000
+ 16104985 × 300000 that is equal 4831495500000
+ 16104985 × 8000000 yielding 128839880000000

= 134973511852205
