No problem, we've got 4245 and 7100 to multiply
4245 × 7100 = 7100 × (4245)
+ 7100 × 5 that equals 35500
+ 7100 × 40 that equals 284000
+ 7100 × 200 what gives us 1420000
+ 7100 × 4000 yielding 28400000

= 30139500
