Alright, let's work through 68120497 times 42543640 step by step
68120497 × 42543640 = 42543640 × (68120497)
+ 42543640 × 7 that results in 297805480
+ 42543640 × 90 that is equal 3828927600
+ 42543640 × 400 which equals 17017456000
+ 42543640 × 0000 giving us 0
+ 42543640 × 20000 giving us 850872800000
+ 42543640 × 100000 that results in 4254364000000
+ 42543640 × 8000000 resulting in 340349120000000
+ 42543640 × 60000000 that is equal 2552618400000000

= 2898093900989080
