No problem, we've got 4315 and 4056 to multiply
4315 × 4056 = 4056 × (4315)
+ 4056 × 5 which equals 20280
+ 4056 × 10 giving us 40560
+ 4056 × 300 resulting in 1216800
+ 4056 × 4000 what gives us 16224000

= 17501640
