Alright, let's work through 81642294 times 86260751 step by step
81642294 × 86260751 = 86260751 × (81642294)
+ 86260751 × 4 which equals 345043004
+ 86260751 × 90 giving us 7763467590
+ 86260751 × 200 producing 17252150200
+ 86260751 × 2000 that is equal 172521502000
+ 86260751 × 40000 what gives us 3450430040000
+ 86260751 × 600000 that equals 51756450600000
+ 86260751 × 1000000 yielding 86260751000000
+ 86260751 × 80000000 resulting in 6900860080000000

= 7042525593802794
