No problem, we've got 3987 and 7173 to multiply
3987 × 7173 = 7173 × (3987)
+ 7173 × 7 what gives us 50211
+ 7173 × 80 that results in 573840
+ 7173 × 900 that results in 6455700
+ 7173 × 3000 which equals 21519000

= 28598751
