Alright, let's work through 2160 times 335 step by step
2160 × 335 = 335 × (2160)
+ 335 × 0 what gives us 0
+ 335 × 60 what gives us 20100
+ 335 × 100 producing 33500
+ 335 × 2000 giving us 670000

= 723600
