Alright, let's work through 77269773 times 5015304 step by step
77269773 × 5015304 = 5015304 × (77269773)
+ 5015304 × 3 that results in 15045912
+ 5015304 × 70 yielding 351071280
+ 5015304 × 700 that equals 3510712800
+ 5015304 × 9000 that results in 45137736000
+ 5015304 × 60000 resulting in 300918240000
+ 5015304 × 200000 which equals 1003060800000
+ 5015304 × 7000000 that equals 35107128000000
+ 5015304 × 70000000 giving us 351071280000000

= 387531401605992
