I get it. The question is not whether 2x3=6. If it was then there would be no need for a thread.
In games, especially ones with many possible combinatory effects, this is often how multiplication is handled.
The equation is:
I would love some crouching tiger, hidden dragon, in the game. It would appear the 5E precedence with identical effects is take the strongest one and apply it.
Actually, that is a really good point. This would easily fall under the section in the PHB at the beginning of the Spells chapter. In this case, 3x would be the total jump distance multiplier but for a different reason than [MENTION=6748898]ad_hoc[/MENTION] was mentioning.
This may be the case in a previous edition, but there is no indication anywhere in 5e (to my knowledge) that this is the way it should be.
Step of the Wind appears to be designed to make a monk, a class that normally focuses on Dex over Str, be able to jump roughly as far as the high strength fighter. No one would bat an eyelash at a Str 20 fighter jumping 60 feet with the jump spell (aside from how to handle the 10 foot run up). The monk that combines Step of the Wind with the jump spell is just doing the same thing. I would argue that it is designed to be a 60 ft. jump in the OP's scenario.
Ring of jumping is a bonus actionA Monk with Step of the Wind has a Ring of Jumping.
Step of the Wind doubles jump distance, Ring of Jumping triples jump distance.
Assuming she has the movement to do it.... her jump distance would be X6?