No problem, we've got 5287 and 2390 to multiply
5287 × 2390 = 2390 × (5287)
+ 2390 × 7 what gives us 16730
+ 2390 × 80 that equals 191200
+ 2390 × 200 what gives us 478000
+ 2390 × 5000 that is equal 11950000

= 12635930
