No problem, we've got 1987 and 1988 to multiply
1987 × 1988 = 1988 × (1987)
+ 1988 × 7 which equals 13916
+ 1988 × 80 that results in 159040
+ 1988 × 900 what gives us 1789200
+ 1988 × 1000 resulting in 1988000

= 3950156
