Alright, let's work through 79807130 times 72640819 step by step
79807130 × 72640819 = 72640819 × (79807130)
+ 72640819 × 0 that is equal 0
+ 72640819 × 30 that results in 2179224570
+ 72640819 × 100 what gives us 7264081900
+ 72640819 × 7000 resulting in 508485733000
+ 72640819 × 00000 that is equal 0
+ 72640819 × 800000 that equals 58112655200000
+ 72640819 × 9000000 that equals 653767371000000
+ 72640819 × 70000000 yielding 5084857330000000

= 5797255285239470
