The gauge is the same but one is in Farenheit (180 degrees for example) and the other Centigrade.
If it was running at 180 centigrade you'd know about it
Either way if the needle points straight up in the middle of the gauge it's up to normal running temperature. 3/4 for in town if it's getting a bit warm any more and it's getting a bit too hot.
Just make sure your coolant filler tank is topped up. If not it may have a split in it (common problem).