No problem, we've got 1247 and 4180 to multiply
1247 × 4180 = 4180 × (1247)
+ 4180 × 7 giving us 29260
+ 4180 × 40 what gives us 167200
+ 4180 × 200 that is equal 836000
+ 4180 × 1000 resulting in 4180000

= 5212460
