I am really sorry to bother you but I'm trying to avoid buying more bricks that the ones I will need. I don't want to have an extra of 100 bricks on my backyard 
I have plans to build an oven with an internal diameter of 40 inches = 1 meter.
Do you have any idea how many bricks I will need to buy? I know that I need to buy some extra due to some wrong cuts but I will like to have some numbers.
Thank you so much.

I have plans to build an oven with an internal diameter of 40 inches = 1 meter.
Do you have any idea how many bricks I will need to buy? I know that I need to buy some extra due to some wrong cuts but I will like to have some numbers.
Thank you so much.
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