Alright, let's work through 8359405 times 79507213 step by step
8359405 × 79507213 = 79507213 × (8359405)
+ 79507213 × 5 giving us 397536065
+ 79507213 × 00 producing 0
+ 79507213 × 400 that results in 31802885200
+ 79507213 × 9000 what gives us 715564917000
+ 79507213 × 50000 yielding 3975360650000
+ 79507213 × 300000 which equals 23852163900000
+ 79507213 × 8000000 that is equal 636057704000000

= 664632993888265
