Alright, let's work through 84608369 times 77306821 step by step
84608369 × 77306821 = 77306821 × (84608369)
+ 77306821 × 9 which equals 695761389
+ 77306821 × 60 which equals 4638409260
+ 77306821 × 300 what gives us 23192046300
+ 77306821 × 8000 that results in 618454568000
+ 77306821 × 00000 that is equal 0
+ 77306821 × 600000 that equals 46384092600000
+ 77306821 × 4000000 yielding 309227284000000
+ 77306821 × 80000000 that is equal 6184545680000000

= 6540804037384949
