Alright, let's work through 71646387 times 40980981 step by step
71646387 × 40980981 = 40980981 × (71646387)
+ 40980981 × 7 what gives us 286866867
+ 40980981 × 80 that results in 3278478480
+ 40980981 × 300 resulting in 12294294300
+ 40980981 × 6000 what gives us 245885886000
+ 40980981 × 40000 what gives us 1639239240000
+ 40980981 × 600000 that equals 24588588600000
+ 40980981 × 1000000 that is equal 40980981000000
+ 40980981 × 70000000 giving us 2868668670000000

= 2936139224365647
