Try mplementing operator+= (broken but almost there).

tools/calc_advance.rb

@@ -0,0 +1,20 @@
+#!/usr/bin/env ruby
+
+M = 2147483647
+
+def calc(arr, m)
+	v = M
+	index = 0
+	out = arr.dup
+	while (v > 0) do
+		v += arr[index]
+		#puts "index #{index} - v is #{v}, m is #{m[index]}"
+		out[index] = v % (m[index] + 1)
+		v /= (m[index] + 1)
+		index += 1
+	end
+	out
+end
+
+p calc([540, 800, 1200, 710], [M - 10, M - 11, M - 12, M - 13])
+p calc([M, 800, 1200, 710], [M, 800, M, M])