He lives in her apartment building and is learning kungfu, but his shoes size is not very common, it's size 44.

他住在她的公寓里，而且正在学功夫，但是他的鞋子尺码很不常见，是44号。

youdao

Those who deliberated for two minutes and then were distracted for two minutes chose a rule-abiding apartment 44% of the time, but identified the apartment with the best aggregate of attributes 58% of the time.

CNN: Got a big decision to make? Sleep on it

In order to accommodate ordinance workers from out-oftown, the Church purchased a 44-unit apartment complex for them to live in, located in Kensington about a mile from the Temple.

FORBES: Maryland Exempts Residence For Mormon Temple Workers As "Convent"