some overwritten property has been simplyfied

02_Day_Introduction_to_React/02_introduction_to_react.md

@@ -708,7 +708,6 @@ Instead of style object using regular styling method is more easier than the abo
 
       header {
         background-color: #61dbfb;
-        padding: 25;
         padding: 10px;
       }
 
@@ -988,13 +987,11 @@ Now, let us put everything together. Here in the example below, the data is inje
 
       header {
         background-color: #61dbfb;
-        padding: 25;
         padding: 10px;
       }
 
       main {
-        padding: 10px;
-        padding-bottom: 60px;
+        padding: 10px 10px 60px;
         /* Height of the footer */
       }
 
@@ -1200,13 +1197,11 @@ In the following code example, the list is now containing list elements and form
 
       header {
         background-color: #61dbfb;
-        padding: 25;
         padding: 10px;
       }
 
       main {
-        padding: 10px;
-        padding-bottom: 60px;
+        padding: 10px 10px 60px;
         /* Height of the footer */
       }
 
@@ -1407,7 +1402,6 @@ As you can see above, now the lists are formatted properly but there is warning
 
       header {
         background-color: #61dbfb;
-        padding: 25;
         padding: 10px;
       }