No problem, we've got 7978 and 3156 to multiply
7978 × 3156 = 3156 × (7978)
+ 3156 × 8 that equals 25248
+ 3156 × 70 producing 220920
+ 3156 × 900 that equals 2840400
+ 3156 × 7000 that is equal 22092000

= 25178568
