5e OGL Sheet, prompt damage roll from attack to roll x number of damage dice?

I know I can do it via a simple macro, but I like to keep things looking nice, and if I can do it within the sheet all the better. Basically I have a creature that can only attack via charging, and it's damage (assuming it hits of course) is 1dx for every 10 feet it traveled before reaching the target. Given this can change per target I want to know if there is anyway for the attack to prompt me to enter the number of dice it needs to roll. EDIT: I just realized I typed "attack dice" instead "damage dice" in the title, I meant damage not attack.

Jake W. said: EDIT: I just realized I typed "attack dice" instead "damage dice" in the title, I meant damage not attack. Fixed!&nbsp; The command you're looking for is [[[[floor(?{How many feet moved?}/10)]]dx]] See&nbsp;<a href="https://wiki.roll20.net/Macros#Using_a_variable_with_a_Macro" rel="nofollow">https://wiki.roll20.net/Macros#Using_a_variable_with_a_Macro</a> for more information!

My man! Saving my bacon on both counts! Thanks a ton Franky. :)