The formula to convert degrees Celsius to degrees Fahrenheit is F = (C × 9/5) + 32.

Substituting C = 220 into the formula, we get:

F = (220 × 9/5) + 32

F = (1980/5) + 32

F = 396 + 32

F = 428

Therefore, 220 degrees Celsius is equal to 428 degrees Fahrenheit.