First of all, you have to get the fire block for the game by using ‘/give’ command on your computer. Just open ‘Run’ option in your PC by going to the start menu and type ‘/give’. On the other hand, you can also use inventory editor option so as to get the option of fire. You must keep in mind that the block ID number for fire option is 51.
Then, open your inventory and use the option of four wooden planks in order to make a workbench which is commonly known as the crafting table. After that, just set the workbench on the floor. Now, right click on the option of workbench so as to open the crafting table option.
After setting the workbench, you have to align the fire on the grid in a way so that you can easily use all the other kinds of armor. You must keep in mind that the helmet will require 5 blocks which will include bottom right corner, bottom left corner and the middle row. Moreover, the chest-plate will require 8 blocks consisting of all the spaces apart from the top middle space. In addition, the leggings require 7 blocks. Besides, the boots will need around 4 blocks (the bottom two spaces of the right and left column).