How can I get value in MAP from JSON in Apex?

Hi,
Map<String, Object> m = (Map<String, Object>) JSON.deserializeUntyped(jsonInput);
Map<String, Object> m2 = (Map<String, Object>) m.get(‘info5’);
List<decimal> d = new List<decimal>();
for(String s:m2.keyset()) {
decimal t = (decimal) m2.get(s);
d.add(t);
}