No problem, we've got 2521 and 8397 to multiply
2521 × 8397 = 8397 × (2521)
+ 8397 × 1 yielding 8397
+ 8397 × 20 that results in 167940
+ 8397 × 500 that is equal 4198500
+ 8397 × 2000 that results in 16794000

= 21168837
