   ﹍﹍r = nr
   """
   "31415926535897932384"
+
+  # using "common math" operator precedence
+  # and associativity:
+
+  """
+  q = 1
+  r = 0
+  t = 1
+  k = 1
+  n = 3
+  l = 3
+  repeat 82:
+  ﹍if 4*q+r-t < n*t:
+  ﹍﹍console print n
+  ﹍﹍nr = 10*(r-n*t)
+  ﹍﹍n = 10*(3*q+r) /_ t - 10*n
+  ﹍﹍q *= 10
+  ﹍﹍r = nr
+  ﹍else:
+  ﹍﹍nr = (2*q+r) * l
+  ﹍﹍nn = (q*(7*k+2)+r*l) /_ (t*l)
+  ﹍﹍q *= k
+  ﹍﹍t *= l
+  ﹍﹍l += 2
+  ﹍﹍k += 1
+  ﹍﹍n = nn
+  ﹍﹍r = nr
+  """
+  "31415926535897932384"
+
 
 # ---------------------------------------------------------------------------
 # ranges

  "console print 8 - 3 - 2"
  "3"

  # ---------------------------------------------------------------------------
  "console print (2 * 3) + 1"
  "7"

  ﹍﹍console print operandum
  2+3

  Number answer with priority 4:
  ﹍﹍+ (operandum)
  ﹍by:
  ﹍﹍self $plus_binary_default operandum
