No problem, we've got 5171 and 6440 to multiply
5171 × 6440 = 6440 × (5171)
+ 6440 × 1 what gives us 6440
+ 6440 × 70 what gives us 450800
+ 6440 × 100 producing 644000
+ 6440 × 5000 that is equal 32200000

= 33301240
