No problem, we've got 4923 and 2623 to multiply
4923 × 2623 = 2623 × (4923)
+ 2623 × 3 resulting in 7869
+ 2623 × 20 that is equal 52460
+ 2623 × 900 that results in 2360700
+ 2623 × 4000 which equals 10492000

= 12913029
