3 dice with 7 sides - 3D7 dice generator
How the 3D7 virtual dice generator works
Here's an explanation of 3 dice with 7 sides: these dice generate a random number among the 7 available faces. The result is a fair, un-rigged online die roll.
We call this a 3D7 dice generator because, among other things, it rolls virtual dice. Here you roll 3 dice with 7 sides each. The number of probability events matches the number of faces on each die, which lets you work out various mathematical calculations for them.
You'll find more about randomness and chance across the other dice on this site.