Alright, let's work through 1864 times 680 step by step
1864 × 680 = 680 × (1864)
+ 680 × 4 which equals 2720
+ 680 × 60 yielding 40800
+ 680 × 800 that results in 544000
+ 680 × 1000 which equals 680000

= 1267520
