Alright, let's work through 1578 times 7628 step by step
1578 × 7628 = 7628 × (1578)
+ 7628 × 8 that equals 61024
+ 7628 × 70 giving us 533960
+ 7628 × 500 that is equal 3814000
+ 7628 × 1000 giving us 7628000

= 12036984
