Fix typo in doc/reference.rst

diff --git a/doc/reference.rst b/doc/reference.rst
index 4dcfbdc..20168e4 100644 (file)
--- a/doc/reference.rst
+++ b/doc/reference.rst
@@ -148,11 +148,11 @@ For example, if ``x`` is a :class:`Symbol`, then ``x + 1`` is an instance of :cl
 
     .. method:: __mul__(value)
 
-        Return the product of the linear expression as a rational.
+        Return the product of the linear expression by a rational.
 
     .. method:: __truediv__(value)
 
-        Return the quotient of the linear expression as a rational.
+        Return the quotient of the linear expression by a rational.
 
     .. method:: __eq__(expr)