Alright, let's work through 1803 times 6787 step by step
1803 × 6787 = 6787 × (1803)
+ 6787 × 3 giving us 20361
+ 6787 × 00 which equals 0
+ 6787 × 800 resulting in 5429600
+ 6787 × 1000 that equals 6787000

= 12236961
