Alright, let's work through 7841 times 1363 step by step
7841 × 1363 = 1363 × (7841)
+ 1363 × 1 resulting in 1363
+ 1363 × 40 what gives us 54520
+ 1363 × 800 that is equal 1090400
+ 1363 × 7000 what gives us 9541000

= 10687283
