No problem, we've got 1604 and 5170 to multiply
1604 × 5170 = 5170 × (1604)
+ 5170 × 4 what gives us 20680
+ 5170 × 00 giving us 0
+ 5170 × 600 resulting in 3102000
+ 5170 × 1000 resulting in 5170000

= 8292680
