Alright, let's work through 67998899 times 54209975 step by step
67998899 × 54209975 = 54209975 × (67998899)
+ 54209975 × 9 that equals 487889775
+ 54209975 × 90 which equals 4878897750
+ 54209975 × 800 what gives us 43367980000
+ 54209975 × 8000 producing 433679800000
+ 54209975 × 90000 that is equal 4878897750000
+ 54209975 × 900000 producing 48788977500000
+ 54209975 × 7000000 that results in 379469825000000
+ 54209975 × 60000000 what gives us 3252598500000000

= 3686218614817525
