Then Allah tells us that Hell has seven gates:
﴿لِكُلِّ بَابٍ مِّنْهُمْ جُزْءٌ مَّقْسُومٌ﴾
(for each of those gates is a (special) class (of sinners) assigned.) means, for each gate a portion of the followers of Iblis have been decreed, and they will have no choice in the matter. May Allah save us from that. Each one will enter a gate according to his deeds, and will settle in a level of Hell according to his deeds. Ibn Abi Hatim recorded that Samurah bin Jundub reported from the Prophet about,
﴿لِكُلِّ بَابٍ مِّنْهُمْ جُزْءٌ مَّقْسُومٌ﴾
(for each of those gates is a class assigned.) He said,
«إِنَّ مِنْ أَهْلِ النَّارِ مَنْ تَأْخُذُهُ النَّارُ إِلَى كَعْبَيْهِ، وَإِنَّ مِنْهُمْ مَنْ تَأْخُذُهُ النَّارُ إِلَى حُجْزَتِهِ، وَمِنْهُمْ مَنْ تَأْخُذُهُ النَّارُ إِلَى تَرَاقِيه»
(Among the people of Hell are those whom the Fire will swallow up to the ankles, and those whom it will swallow up to the waist, and those whom it will swallow up to the collarbone.) The degree of which will depend upon their deeds. This is like the Ayah;
﴿لِكُلِّ بَابٍ مِّنْهُمْ جُزْءٌ مَّقْسُومٌ﴾
(for each of those gates is a class assigned.)
Source: Suratul Hijr
