No problem, we've got 2907 and 5217 to multiply
2907 × 5217 = 5217 × (2907)
+ 5217 × 7 yielding 36519
+ 5217 × 00 that is equal 0
+ 5217 × 900 what gives us 4695300
+ 5217 × 2000 yielding 10434000

= 15165819
