Alright, let's work through 68712471 times 63690794 step by step
68712471 × 63690794 = 63690794 × (68712471)
+ 63690794 × 1 what gives us 63690794
+ 63690794 × 70 what gives us 4458355580
+ 63690794 × 400 yielding 25476317600
+ 63690794 × 2000 that is equal 127381588000
+ 63690794 × 10000 that equals 636907940000
+ 63690794 × 700000 resulting in 44583555800000
+ 63690794 × 8000000 giving us 509526352000000
+ 63690794 × 60000000 what gives us 3821447640000000

= 4376351835691974
