The answer is: 12

(Rev 7:4) / (Rev 21:16) = (144000) / (12000) = 12

Diving into that fascinating math from Revelation gives us a neat glimpse into the symbolic richness of the Bible. Number patterns and values in Scripture often carry profound significance. The sealing of 144,000 in Revelation (Rev 7:4) is not just about a specific number; it represents a larger idea of community and divine promise. Sealed by God, these individuals embody protection and belonging—a comforting thought for many believers.

Now, flip over to the New Jerusalem in Revelation 21:16. The city is described as being 12,000 stadia in length, width, and height, which is quite a sizeable dimension! Interestingly, the geometry here presents a perfect cube—a structure symbolizing completeness and wholeness. Cubes have profound significance in various cultures, portraying unity and balance, akin to how this heavenly city reflects God's ultimate plan for humanity.

When we connect the two calculations—144,000 sealed and the New Jerusalem's measurements—we arrive at that number 12. This number itself is steeped in biblical significance: think of the 12 tribes of Israel and the 12 apostles. Each group represents a developing relationship between humanity and the divine, spanning generations in both Jewish and Christian traditions.

So, what’s the takeaway? The intricacies of Revelation invite us not just to multiply and divide but to dive into a deeper spiritual and symbolic journey — one that challenges us and enlightens us with reminders of hope, unity, and completeness.