Alright, let's work through 21212356 times 74276121 step by step
21212356 × 74276121 = 74276121 × (21212356)
+ 74276121 × 6 what gives us 445656726
+ 74276121 × 50 yielding 3713806050
+ 74276121 × 300 what gives us 22282836300
+ 74276121 × 2000 yielding 148552242000
+ 74276121 × 10000 that equals 742761210000
+ 74276121 × 200000 giving us 14855224200000
+ 74276121 × 1000000 producing 74276121000000
+ 74276121 × 20000000 which equals 1485522420000000

= 1575571520951076
