Alright, let's work through 2104 times 2002 step by step
2104 × 2002 = 2002 × (2104)
+ 2002 × 4 what gives us 8008
+ 2002 × 00 yielding 0
+ 2002 × 100 yielding 200200
+ 2002 × 2000 that equals 4004000

= 4212208
