 <translate> In one building, there are 4 - 1 = 3 floors that have 5 apartment units each. Mr. Resty has a total of 3 floors x 5 units = 15 apartment units from the 2nd to 4th floor in one building. So, in one building, there are a total of 15 + 2 = 17 apartment units. Therefore, Mr. Resty has a total of 17 x 2 = 34 apartment units in his 2 buildings.
Thus, the answer is 34. <yor> Nínú ilé kan, ìlẹ̀kẹ̀ mẹ́ta ló wà, ìlẹ̀kẹ̀ márùn-ún ló sì wà nínú ilé kọ̀ọ̀kan. Ọ̀gbẹ́ni Resty ní àpapọ̀ ilé mẹ́ta x ilé márùn-ún = ilé mẹ́ẹ̀ẹ́dógún láti ilé kejì sí ilé kẹrin nínú ilé kan. Nítorí náà, nínú ilé kan, àpapọ̀ àwọn ilé gbígbé 15+2=17 ni. Nítorí náà, ọ̀gbẹ́ni Resty ní àpapọ̀ ilé gbígbé 17 x 2 = 34 nínú ilé rẹ̀ méjì. Nítorí náà, ìdáhùn náà ni 34. 