Alright, let's work through 7879 times 1998 step by step
7879 × 1998 = 1998 × (7879)
+ 1998 × 9 what gives us 17982
+ 1998 × 70 that results in 139860
+ 1998 × 800 that equals 1598400
+ 1998 × 7000 what gives us 13986000

= 15742242
