Added example for english version and fixed typos.

_sources/lectures/TWP40/TWP40_12.rst

@@ -15,20 +15,22 @@ Conversión de grados usando C
 
         int main(void){
             float F, C;
-            printf("Farenheit: ");
+            printf("Fahrenheit: ");
             scanf("%f", &F);
             C = 5.0 * (F - 32.0) / 9.0;
             printf("Celsius: %2.1f\n", C);
         }
 
 Conversión de grados usando Python
-----------------------------------
+-----------------------------------
+
++ Ahora vamos a convertir el programa anterior a Python.
 
 .. code-block:: python
 
-    F = float(input("Farenheit: "))
-    C = 5.0 * (F - 32.0) // 9.0
-    print("Celsius: %2.1f" % C)   
+    F = float(input("Fahrenheit: "))
+    C = 5.0 * (F - 32.0) / 9.0
+    print("Celsius: %2.1f" % C)
 
 .. poll:: TWP40
    :scale: 3

_sources/lectures/TWP40/TWP40_12_en.rst

@@ -21,6 +21,17 @@ Converting degrees using C
             printf("Celsius: %2.1f\n", C);
         }
 
+Converting degrees using Python
+----------------------------------
+
++ Now we will convert the previous program to Python.
+
+.. code-block:: python
+
+    F = float(input("Fahrenheit: "))
+    C = 5.0 * (F - 32.0) / 9.0
+    print("Celsius: %2.1f" % C)
+
 .. poll:: TWP40E
    :scale: 3
    :allowcomment: