According to my research on information technology and pc hardware, I can say that based on the information provided within the question the product that could help in this situation is a UPS. This is an Uninterruptible Power Supply, a device that provides battery backup when the electrical power fails or drops to an unacceptable voltage level. It is used in situations like the one mentioned in the question to protect computer from electrical storms.
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Answer: The math module is a standard module in Python and is always available. To use mathematical functions under this module, you have to import the module using import math .
Best way to store all your files is a external storage device, like a hard drive or a usb stick, copy all your files to the device and keep it in a safe place.