Number of 9 inch pots on 12.75ft by 75ft bench

Estimate how many 9 inch diameter pots can fit on 12.75 ft wide by 75 ft long bench

9" = 3/4 foot. (.75 ft)

So, you can place 12.75 / .75 = 17 pots along the 12.75 ft length and 100 pots along the 75 ft length. 17 x 100 = 1700 pots.