Use percent composition and molar mass to determine molecular formula.

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Analysis of a compound of silicon, bromine and iodine showed that it is $6\mathrm{.}360\%$ Si and $36\mathrm{.}18\%$ Br$,$ with I accounting for the remainder. In a separate experiment, the molar mass of the compound was found to be $441\mathrm{.}7$ g$/$mol$.$ Determine the molecular formula of the compound.

Enter the elements

in the order Si$,$ Br$,$ I.