No problem, we've got 1998 and 6940 to multiply
1998 × 6940 = 6940 × (1998)
+ 6940 × 8 which equals 55520
+ 6940 × 90 that equals 624600
+ 6940 × 900 that is equal 6246000
+ 6940 × 1000 that is equal 6940000

= 13866120
