Alright, let's work through 71809974 times 81821706 step by step
71809974 × 81821706 = 81821706 × (71809974)
+ 81821706 × 4 yielding 327286824
+ 81821706 × 70 producing 5727519420
+ 81821706 × 900 resulting in 73639535400
+ 81821706 × 9000 giving us 736395354000
+ 81821706 × 00000 which equals 0
+ 81821706 × 800000 that results in 65457364800000
+ 81821706 × 1000000 producing 81821706000000
+ 81821706 × 70000000 what gives us 5727519420000000

= 5875614580495644
