diff --git a/mapytex/calculus/__init__.py b/mapytex/calculus/__init__.py
index 84fc9e8..d1aef78 100644
--- a/mapytex/calculus/__init__.py
+++ b/mapytex/calculus/__init__.py
@@ -31,6 +31,9 @@ Expression is the classe wich handle all calculus. It can randomly generate or i
 """
 
 from .API import Expression, Integer, Decimal
+from decimal import getcontext
+#getcontext().prec = 2
+
 
 __all__ = ["Expression"]