Do supererogatory prayers (nafl) during Ramadan equal obligatory prayers (fard)? And is the multiplication of the reward for obligatory prayers specific to the Haram, or does it include any place?

The reward for supererogatory prayers (Nawafil) in Ramadan is not equivalent to that of obligatory prayers (Fard). However, the reward for acts of obedience, whether supererogatory or obligatory, is magnified in virtuous times and places, such as Ramadan and Mecca. Just as sins are aggravated in these times and places, so too are good deeds multiplied. Nevertheless, specifying a particular measure for this multiplication requires specific evidence.