Alright, let's work through 1670 times 780 step by step
1670 × 780 = 780 × (1670)
+ 780 × 0 which equals 0
+ 780 × 70 producing 54600
+ 780 × 600 what gives us 468000
+ 780 × 1000 that results in 780000

= 1302600
