Here's how to convert Celsius to Fahrenheit:

* Formula: F = (C * 9/5) + 32

* Where:

* F = Fahrenheit

* C = Celsius

Calculations:

* 500°C: (500 * 9/5) + 32 = 932°F

* 900°C: (900 * 9/5) + 32 = 1652°F

Therefore:

* 500 degrees Celsius is equal to 932 degrees Fahrenheit.

* 900 degrees Celsius is equal to 1652 degrees Fahrenheit.