Alright, let's work through 85304392 times 77392592 step by step
85304392 × 77392592 = 77392592 × (85304392)
+ 77392592 × 2 yielding 154785184
+ 77392592 × 90 producing 6965333280
+ 77392592 × 300 which equals 23217777600
+ 77392592 × 4000 that equals 309570368000
+ 77392592 × 00000 that results in 0
+ 77392592 × 300000 yielding 23217777600000
+ 77392592 × 5000000 producing 386962960000000
+ 77392592 × 80000000 giving us 6191407360000000

= 6601928005864064
