Alright, let's work through 21456631 times 52734003 step by step
21456631 × 52734003 = 52734003 × (21456631)
+ 52734003 × 1 what gives us 52734003
+ 52734003 × 30 resulting in 1582020090
+ 52734003 × 600 resulting in 31640401800
+ 52734003 × 6000 yielding 316404018000
+ 52734003 × 50000 what gives us 2636700150000
+ 52734003 × 400000 what gives us 21093601200000
+ 52734003 × 1000000 what gives us 52734003000000
+ 52734003 × 20000000 giving us 1054680060000000

= 1131494043523893
