Alright, let's work through 1315 times 1260 step by step
1315 × 1260 = 1260 × (1315)
+ 1260 × 5 producing 6300
+ 1260 × 10 that is equal 12600
+ 1260 × 300 which equals 378000
+ 1260 × 1000 that is equal 1260000

= 1656900
