No problem, we've got 1672 and 2509 to multiply
1672 × 2509 = 2509 × (1672)
+ 2509 × 2 yielding 5018
+ 2509 × 70 that equals 175630
+ 2509 × 600 what gives us 1505400
+ 2509 × 1000 what gives us 2509000

= 4195048
