No problem, we've got 1621 and 8253 to multiply
1621 × 8253 = 8253 × (1621)
+ 8253 × 1 yielding 8253
+ 8253 × 20 that is equal 165060
+ 8253 × 600 giving us 4951800
+ 8253 × 1000 which equals 8253000

= 13378113
