Alright, let's work through 3126 times 2100 step by step
3126 × 2100 = 2100 × (3126)
+ 2100 × 6 which equals 12600
+ 2100 × 20 that results in 42000
+ 2100 × 100 that equals 210000
+ 2100 × 3000 that is equal 6300000

= 6564600
