Alright, let's work through 71640828 times 23420266 step by step
71640828 × 23420266 = 23420266 × (71640828)
+ 23420266 × 8 that is equal 187362128
+ 23420266 × 20 yielding 468405320
+ 23420266 × 800 that equals 18736212800
+ 23420266 × 0000 giving us 0
+ 23420266 × 40000 that results in 936810640000
+ 23420266 × 600000 producing 14052159600000
+ 23420266 × 1000000 which equals 23420266000000
+ 23420266 × 70000000 which equals 1639418620000000

= 1677847248220248
