No problem, we've got 7890 and 7940 to multiply
7890 × 7940 = 7940 × (7890)
+ 7940 × 0 resulting in 0
+ 7940 × 90 that results in 714600
+ 7940 × 800 that equals 6352000
+ 7940 × 7000 that results in 55580000

= 62646600
