Alright, let's work through 81441979 times 31979225 step by step
81441979 × 31979225 = 31979225 × (81441979)
+ 31979225 × 9 which equals 287813025
+ 31979225 × 70 yielding 2238545750
+ 31979225 × 900 that equals 28781302500
+ 31979225 × 1000 resulting in 31979225000
+ 31979225 × 40000 that is equal 1279169000000
+ 31979225 × 400000 that is equal 12791690000000
+ 31979225 × 1000000 producing 31979225000000
+ 31979225 × 80000000 that equals 2558338000000000

= 2604451370886275
