No problem, we've got 1648 and 4165 to multiply
1648 × 4165 = 4165 × (1648)
+ 4165 × 8 giving us 33320
+ 4165 × 40 which equals 166600
+ 4165 × 600 resulting in 2499000
+ 4165 × 1000 that results in 4165000

= 6863920
