Alright, let's work through 67729975 times 42105405 step by step
67729975 × 42105405 = 42105405 × (67729975)
+ 42105405 × 5 which equals 210527025
+ 42105405 × 70 that equals 2947378350
+ 42105405 × 900 that results in 37894864500
+ 42105405 × 9000 that is equal 378948645000
+ 42105405 × 20000 resulting in 842108100000
+ 42105405 × 700000 resulting in 29473783500000
+ 42105405 × 7000000 giving us 294737835000000
+ 42105405 × 60000000 which equals 2526324300000000

= 2851798028014875
