Alright, let's work through 1003 times 1798 step by step
1003 × 1798 = 1798 × (1003)
+ 1798 × 3 which equals 5394
+ 1798 × 00 what gives us 0
+ 1798 × 000 what gives us 0
+ 1798 × 1000 that is equal 1798000

= 1803394
