Alright, let's work through 79902597 times 88574157 step by step
79902597 × 88574157 = 88574157 × (79902597)
+ 88574157 × 7 that is equal 620019099
+ 88574157 × 90 resulting in 7971674130
+ 88574157 × 500 giving us 44287078500
+ 88574157 × 2000 resulting in 177148314000
+ 88574157 × 00000 which equals 0
+ 88574157 × 900000 giving us 79716741300000
+ 88574157 × 9000000 yielding 797167413000000
+ 88574157 × 70000000 what gives us 6200190990000000

= 7077305171385729
