Alright, let's work through 61963843 times 72187119 step by step
61963843 × 72187119 = 72187119 × (61963843)
+ 72187119 × 3 what gives us 216561357
+ 72187119 × 40 that is equal 2887484760
+ 72187119 × 800 resulting in 57749695200
+ 72187119 × 3000 that results in 216561357000
+ 72187119 × 60000 that results in 4331227140000
+ 72187119 × 900000 that is equal 64968407100000
+ 72187119 × 1000000 that results in 72187119000000
+ 72187119 × 60000000 that results in 4331227140000000

= 4472991308338317
