question #3 Sahih al-Bukhari 468, Book 8, Hadith 116 : How did the Prophet Muhammad (ﷺ) perform prayers inside the Ka`ba according to this narration?

Ibn `Umar said, “The Prophet (ﷺ) arrived at Mecca and sent for `Uthman bin Talha. He opened the gate of
the Ka`ba and the Prophet, Bilal, Usama bin Zaid and `Uthman bin Talha entered the Ka`ba and then
they closed its door (from inside). They stayed there for an hour, and then came out.” Ibn `Umar
added, “I quickly went to Bilal and asked him (whether the Prophet (ﷺ) had prayed). Bilal replied, ‘He
prayed in it.’ I asked, ‘Where?’ He replied, ‘Between the two pillars.’ “Ibn `Umar added, “I forgot to
ask how many rak`at he (the Prophet) had prayed in the Ka`ba.”