Alright, let's work through 16121968 times 20797871 step by step
16121968 × 20797871 = 20797871 × (16121968)
+ 20797871 × 8 which equals 166382968
+ 20797871 × 60 that equals 1247872260
+ 20797871 × 900 that results in 18718083900
+ 20797871 × 1000 giving us 20797871000
+ 20797871 × 20000 what gives us 415957420000
+ 20797871 × 100000 that is equal 2079787100000
+ 20797871 × 6000000 which equals 124787226000000
+ 20797871 × 10000000 that results in 207978710000000

= 335302610730128
