Alright, let's work through 81979208 times 97346316 step by step
81979208 × 97346316 = 97346316 × (81979208)
+ 97346316 × 8 that equals 778770528
+ 97346316 × 00 giving us 0
+ 97346316 × 200 that equals 19469263200
+ 97346316 × 9000 that is equal 876116844000
+ 97346316 × 70000 that is equal 6814242120000
+ 97346316 × 900000 yielding 87611684400000
+ 97346316 × 1000000 giving us 97346316000000
+ 97346316 × 80000000 that is equal 7787705280000000

= 7980373887397728
