Neutrino

Simple way to convert Celsius to Fahrenheit in your head:

1. Take the Celsius value and double it

40 * 2 = 80

2. Subtract 10%

80 - 8 = 72

3. Add 32

72 + 32 = 104

40 C = 104 F

This is still hot but a far cry from 118F

Literally the plot of Godzilla.