Alright, let's work through 1680 times 1730 step by step
1680 × 1730 = 1730 × (1680)
+ 1730 × 0 that equals 0
+ 1730 × 80 that is equal 138400
+ 1730 × 600 what gives us 1038000
+ 1730 × 1000 that results in 1730000

= 2906400
