Alright, let's work through 7148 times 6391 step by step
7148 × 6391 = 6391 × (7148)
+ 6391 × 8 that is equal 51128
+ 6391 × 40 that results in 255640
+ 6391 × 100 that is equal 639100
+ 6391 × 7000 giving us 44737000

= 45682868
