A carpet tile measures \(50~\mathrm{cm}%speech% 50 centimeters \) by \(50~\mathrm{cm}%speech% 50 centimeters \).

How many of these tiles would be needed to cover the floor of a room \(6~\mathrm{m} %speech% 6 metres \) long and \(4~\mathrm{m} %speech% 4 metres\) wide?