Alright, let's work through 1021981 times 71156278 step by step
1021981 × 71156278 = 71156278 × (1021981)
+ 71156278 × 1 which equals 71156278
+ 71156278 × 80 yielding 5692502240
+ 71156278 × 900 which equals 64040650200
+ 71156278 × 1000 resulting in 71156278000
+ 71156278 × 20000 that equals 1423125560000
+ 71156278 × 000000 that equals 0
+ 71156278 × 1000000 that results in 71156278000000

= 72720364146718
