Alright, let's work through 77896379 times 37389913 step by step
77896379 × 37389913 = 37389913 × (77896379)
+ 37389913 × 9 that equals 336509217
+ 37389913 × 70 that equals 2617293910
+ 37389913 × 300 what gives us 11216973900
+ 37389913 × 6000 resulting in 224339478000
+ 37389913 × 90000 that equals 3365092170000
+ 37389913 × 800000 yielding 29911930400000
+ 37389913 × 7000000 which equals 261729391000000
+ 37389913 × 70000000 that is equal 2617293910000000

= 2912538833825027
