Alright, let's work through 1963 times 6243 step by step
1963 × 6243 = 6243 × (1963)
+ 6243 × 3 giving us 18729
+ 6243 × 60 that equals 374580
+ 6243 × 900 what gives us 5618700
+ 6243 × 1000 resulting in 6243000

= 12255009
