Alright, let's work through 6261 times 1812 step by step
6261 × 1812 = 1812 × (6261)
+ 1812 × 1 that is equal 1812
+ 1812 × 60 which equals 108720
+ 1812 × 200 giving us 362400
+ 1812 × 6000 that equals 10872000

= 11344932
