You are working in a bio-laboratory, where they produce some special bioelectronic cells which have mitosis ability.
FYI: Mitosis is a process of cell duplication during which one cell gives rise to two genetically identical daughter cells.
This very special cell divides itself into two cells by electronically controlled mitosis, which means it is controlled by a lab employee. In other words, lab employee commands the cell to divide into two. But after mitosis, cell size becomes half as well.
Your boss gave you $80$ of these electronic cells and want you to have the least amount of cells with the same size by mitosis.
By only applying mitosis to the cells, what is the least number of the same sized cells you can have?