Let's calculate 1798 x 3990
1798 × 3990 = 3990 × (1798)
+ 3990 × 8 that equals 31920
+ 3990 × 90 that results in 359100
+ 3990 × 700 which equals 2793000
+ 3990 × 1000 what gives us 3990000

= 7174020
