How many male users have a Galaxy Note 3?
male refers to gender = 'M'; Galaxy Note 3 refers to device_model = 'Galaxy Note 3';
SELECT COUNT(T1.device_id) FROM gender_age AS T1 INNER JOIN phone_brand_device_model2 AS T2 ON T1.device_id = T2.device_id WHERE T2.device_model = 'Galaxy Note 3' AND T1.gender = 'M'