No problem, we've got 2131 and 8700 to multiply
2131 × 8700 = 8700 × (2131)
+ 8700 × 1 that results in 8700
+ 8700 × 30 giving us 261000
+ 8700 × 100 giving us 870000
+ 8700 × 2000 that is equal 17400000

= 18539700
