Alright, let's work through 2345 times 72 step by step
2345 × 72 = 72 × (2345)
+ 72 × 5 that results in 360
+ 72 × 40 what gives us 2880
+ 72 × 300 that results in 21600
+ 72 × 2000 resulting in 144000

= 168840
