Alright, let's work through 3543 times 6990 step by step
3543 × 6990 = 6990 × (3543)
+ 6990 × 3 which equals 20970
+ 6990 × 40 which equals 279600
+ 6990 × 500 producing 3495000
+ 6990 × 3000 that is equal 20970000

= 24765570
