arcgis desktop - Using ModelBuilder to get Max and Min Values from raster to raster calculator?

I'm building a model (ModelBuilder) at ArcMap 10.3.1. How can I get an output (can be a string) of the maximum and the minimum value of a raster to use it on raster calculator?

Actually I'm using the Get Raster Properties tool, and the result I'm putting on raster calculator like this:

-> Square("%raster%" - "%raster_max%"/"%raster_max%" - "%raster_min%")

My problem is that the Get Raster Properties does not export a string with the value. I would like to know if there is a tool or a way using ModelBuilder to extract to Max and Min value of a raster to directly apply on Raster Calculator.

edit: I tried to use Calculate Value tool, with the code:

import arcpy
#Get the geoprocessing result object
maxValueResult = arcpy.GetRasterProperties_management("c:.../..", "MAXIMUM")
#Get the MAX value from geoprocessing result object

maxValue = maxValueResult.getOutput(0)

But it keeps exporting the number only in the results, and it does not convert into a string to use on raster calculator.

Answer

Assuming the raster has already had statistics calculated, you can access the max and min values in the raster calculator directly using "your_raster".maximum and "your_raster".minimum syntax. See this answer for more details.