(Google translate) When launching the attack of the weapon more dice go and it is not known which value to take. It should be a single die of 20 and 3 are rolled. And in the damage an additional 6-sided is being rolled. What character sheet are you using? Can you show a picture of what the result looks like? If you're using the D&D 5E by Roll20 character sheet: I can tell
you that by default it rolls two d20s so it's easier to look at
advantage/disadvantage. If you use neither, just choose the first d20
from the left, just like you would if you'd pick the first number in a
text you would be reading. Considering basically all western languages
read from left to right, it's natural to see whatever is to the left as
being "first". It should be a single die of 20 and 3 are rolled. I don't know why the weapon attack rolls 3 d20s, so I'm not sure it's the 5E sheet that everyone uses, but I could be wrong. And in the damage an additional 6-sided is being rolled. If it is the 5E sheet, sometime an extra damage dice is rolled if either of the d20s roll a critical, but the extra damage should ony be counted if it is the correct d20 that does a critical.
