No problem, we've got 4075 and 1658 to multiply
4075 × 1658 = 1658 × (4075)
+ 1658 × 5 what gives us 8290
+ 1658 × 70 that equals 116060
+ 1658 × 000 resulting in 0
+ 1658 × 4000 producing 6632000

= 6756350
