Alright, let's work through 81801726 times 81324982 step by step
81801726 × 81324982 = 81324982 × (81801726)
+ 81324982 × 6 yielding 487949892
+ 81324982 × 20 giving us 1626499640
+ 81324982 × 700 producing 56927487400
+ 81324982 × 1000 yielding 81324982000
+ 81324982 × 00000 giving us 0
+ 81324982 × 800000 that is equal 65059985600000
+ 81324982 × 1000000 giving us 81324982000000
+ 81324982 × 80000000 that results in 6505998560000000

= 6652523894518932
