No problem, we've got 1970 and 7900 to multiply
1970 × 7900 = 7900 × (1970)
+ 7900 × 0 that equals 0
+ 7900 × 70 that equals 553000
+ 7900 × 900 yielding 7110000
+ 7900 × 1000 that is equal 7900000

= 15563000
