No problem, we've got 3889 and 9971 to multiply
3889 × 9971 = 9971 × (3889)
+ 9971 × 9 that is equal 89739
+ 9971 × 80 that results in 797680
+ 9971 × 800 what gives us 7976800
+ 9971 × 3000 resulting in 29913000

= 38777219
