No problem, we've got 2671 and 1639 to multiply
2671 × 1639 = 1639 × (2671)
+ 1639 × 1 which equals 1639
+ 1639 × 70 which equals 114730
+ 1639 × 600 giving us 983400
+ 1639 × 2000 that is equal 3278000

= 4377769
