Three 7 faced dice are thrown together

Three 7 faced dice are thrown together. The probability that all the three show the same number on them is ?

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #34950