The natural number system (radix) for a digital system will always be 2 - And the natural number system for humans will be based at 10. Hence will a digital designs with a human interface often require conversions between those number systems.

One way to solve the problem could be division and multiplication - examples below.

It's possible to implement this in "pure" hardware -  but the best way to perform conversion will properly be based at a modified shift-register  <READ MORE HERE>.