This entirely depends on the type of cooker you choose to purchase. If you prefer to be flexible with the layout of your kitchen, you should invest in a freestanding oven which will have the hob built-in.
If however you prefer the clean, modern look for your kitchen, you can opt for a built–in gas hob. This allows you the freedom of placing the burners wherever you choose and it will seamlessly fit in with the rest of your kitchen’s surroundings.
Whichever fit type you choose to purchase, it is important to remember that it must be within reach of the gas supply.