No problem, we've got 2657 and 7964 to multiply
2657 × 7964 = 7964 × (2657)
+ 7964 × 7 which equals 55748
+ 7964 × 50 what gives us 398200
+ 7964 × 600 which equals 4778400
+ 7964 × 2000 resulting in 15928000

= 21160348
