Best way to split <ul> in 6 columns with CSS

I have an <ul> list with 248 elements, and I would like to split it into six colums (42 elements, 42, 41, 41, 41, 41). I already divided it into divs (#one, #two, #three, #four, #five, #six) in HTML.

What is the best way to divide it into 6 columns?

Thank you.

# # # Edit

I used width: 16.666%; float: left; and it is working.

Thank you.

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