No problem, we've got 1961 and 7140 to multiply
1961 × 7140 = 7140 × (1961)
+ 7140 × 1 what gives us 7140
+ 7140 × 60 what gives us 428400
+ 7140 × 900 resulting in 6426000
+ 7140 × 1000 yielding 7140000

= 14001540
