# What is *temperature difference*?

**Temperature Difference**is the difference between two temperatures of the same scale.

## Input

**Degree Fahrenheit**is defined by two fixed points, the freezing point (32°) and the boiling point (212°) of water. In temperature difference, 1°F is the same as 1°R (Degree Rankine).

## Output

**Degree Réaumur**is a temperature scale for which the freezing and boiling points of water are defined as 0 and 80 degrees respectively. The temperature difference in Degree Réaumur is exactly 80% of its value in Degree Celsius.