XYZ is 100% financed by equityholders. It has $57 million in excess cash. It expects to generate free cash flows of $37 million per year in subsequent years and will pay out them as regular dividends. XYZ's cost of equity is 9% and there are 13 million shares outstanding. XYZ uses the entire excess cash to repurchase shares. Assume that the capital market is perfect.

How many shares can XYZ repurchase?

(amount in million, round to 1 decimal place)