Alright, let's work through 71590647 times 91494667 step by step
71590647 × 91494667 = 91494667 × (71590647)
+ 91494667 × 7 resulting in 640462669
+ 91494667 × 40 that equals 3659786680
+ 91494667 × 600 resulting in 54896800200
+ 91494667 × 0000 what gives us 0
+ 91494667 × 90000 resulting in 8234520030000
+ 91494667 × 500000 what gives us 45747333500000
+ 91494667 × 1000000 which equals 91494667000000
+ 91494667 × 70000000 giving us 6404626690000000

= 6550162407579549
