No problem, we've got 8121 and 5138 to multiply
8121 × 5138 = 5138 × (8121)
+ 5138 × 1 producing 5138
+ 5138 × 20 which equals 102760
+ 5138 × 100 what gives us 513800
+ 5138 × 8000 giving us 41104000

= 41725698
