Difference between baking a cake in cooking range and microwave oven
A range (also knows as cooker in some places) is a free-standing kitchen appliance with a cooktop (hob) on the top and an oven below. The oven sounds like a conventional gas oven and not a fan assisted (convection) oven. An oven will give you much better cakes than a microwave, you just need to get used to how your oven cooks. 

Most recipes are written to be used in an oven and not a microwave convection oven, so for cooking times and temperatures you should simply go back to the recipe temperature and time for a guide. If the recipe is not available then you will need to do some trial and error. 200C seems a bit high to me, you could end up burning the outside and having the inside overdone. Many cakes are baked between 160 to 180C depending on the type and thickness, so for a conventional (non-fan) oven I would split that down the middle and go for 170C, (155 for a fan oven) and up the cooking time to 20-30 minutes. Try the middle rack your first time cooking in the oven. 

One thing I would recommend is getting an oven thermometer. Many ovens, especially older ones, do not cook at the temperature you set, and can be much hotter or colder than you want leading to bad results. An oven thermometer will tell you how hot your oven actually is inside so you can set it properly.