No problem, we've got 3945 and 6539 to multiply
3945 × 6539 = 6539 × (3945)
+ 6539 × 5 that is equal 32695
+ 6539 × 40 which equals 261560
+ 6539 × 900 that is equal 5885100
+ 6539 × 3000 that equals 19617000

= 25796355
