Thankfully there is a paper on estimating banana size: https://www.researchgate.net/publication/291330381_Modeling_the_Main_Physical_Properties_of_Banana_Fruit_

Thankfully there is a paper on estimating banana size: https://www.researchgate.net/publication/291330381_Modeling_the_Main_Physical_Properties_of_Banana_Fruit_Based_on_Geometrical_Attributes https://www.researchgate.net/publication/291330381_Modeling_... Using a projected area of 70 cm², the floor space should fit ~33142 bananas when tiled end-to-end.