We're going to solve 2578 multiplied by 1978
2578 × 1978 = 1978 × (2578)
+ 1978 × 8 that is equal 15824
+ 1978 × 70 resulting in 138460
+ 1978 × 500 that results in 989000
+ 1978 × 2000 resulting in 3956000

= 5099284
