round x to the n-th digit after ".";
if n = 0 to integers; if n = -2 to hundreds; ...

x =   n =  
  round =   order of magnitude =
If you have to put a coefficient using some function symbol (for example 1/5, √2), put it in a numerical form (0.2, 1.414213562373095), for example using this (or this)
NOTES


examples