No problem, we've got 2639 and 8520 to multiply
2639 × 8520 = 8520 × (2639)
+ 8520 × 9 that results in 76680
+ 8520 × 30 giving us 255600
+ 8520 × 600 that results in 5112000
+ 8520 × 2000 which equals 17040000

= 22484280
