No problem, we've got 4215 and 1520 to multiply
4215 × 1520 = 1520 × (4215)
+ 1520 × 5 yielding 7600
+ 1520 × 10 yielding 15200
+ 1520 × 200 that results in 304000
+ 1520 × 4000 that results in 6080000

= 6406800
