What is is gas mark 4 on an electric oven?

The answer is 190oC as can be seen from the below table:

Fahrenheit Celsius Gas Mark 250°F 120°C Gas Mark ½ 275°F 135°C Gas Mark 1 300°F 149°C Gas Mark 2 325°F 162°C Gas Mark 3 350°F 176°C Gas Mark 4 375°F 190°C Gas Mark 5 400°F 204°C Gas Mark 6 425°F 218°C Gas Mark 7 450°F 232°C Gas Mark 8 475°F 246°C Gas Mark 9 500°F 260°C Gas Mark 9