The fire which sons of Adam burn is only one-seventieth part of the Fire of Hell. His Companions said: By Allah, even ordinary fire would have been enough (to burn people). Thereupon he said: It is sixty-nine parts in excess of (the heat of) fire in this world each of them being equivalent to their heat. (Using translation from Muslim 2843a)
وَقَالَ رَسُولُ اللهِ ﷺ نَارُكُمْ هَذِهِ مَا يُوقِدُ بَنُو آدَمَ جُزْءٌ وَاحِدٌ مِنْ سَبْعِينَ جُزْءًا مِنْ حَرِّ جَهَنَّمَ قَالُوا وَاللهِ إِنْ كَانَتْ لَكَافِيَةً يَا رَسُولَ اللهِ قَالَ فَإِنَّهَا فُضِّلَتْ عَلَيْهَا بِتِسْعَةٍ وَسِتِّينَ جُزْءًا كُلُّهُنَّ مِثْلُ حَرِّهَا