Alright, let's work through 12023534 times 78397977 step by step
12023534 × 78397977 = 78397977 × (12023534)
+ 78397977 × 4 resulting in 313591908
+ 78397977 × 30 that is equal 2351939310
+ 78397977 × 500 giving us 39198988500
+ 78397977 × 3000 producing 235193931000
+ 78397977 × 20000 producing 1567959540000
+ 78397977 × 000000 that is equal 0
+ 78397977 × 2000000 that is equal 156795954000000
+ 78397977 × 10000000 producing 783979770000000

= 942620741990718
