Alright, let's work through 97729747 times 81292138 step by step
97729747 × 81292138 = 81292138 × (97729747)
+ 81292138 × 7 that is equal 569044966
+ 81292138 × 40 giving us 3251685520
+ 81292138 × 700 that is equal 56904496600
+ 81292138 × 9000 what gives us 731629242000
+ 81292138 × 20000 that equals 1625842760000
+ 81292138 × 700000 which equals 56904496600000
+ 81292138 × 7000000 that equals 569044966000000
+ 81292138 × 90000000 giving us 7316292420000000

= 7944660079829086
