Fix grading number style

src/context.yml

@@ -78,12 +78,12 @@ parts:
           [https://vc.sharif.edu/ch/rohban](https://vc.sharif.edu/ch/soleymani).
       - title: Grading
         text: >
-          Assessment of students of both groups will be identical. Please note that grades will be calculated out of 21.5.
+          Assessment of students of both groups will be identical. Please note that grades will be calculated out of $21.5$.
 
             - **1$^{\text{st}}$ Midterm Exam**: $3.0$ points; 1402/08/18 9:00 AM.
             - **2$^{\text{st}}$ Midterm Exam**: $4.0$ points; 1402/09/30 9:00 AM.
             - **Final Exam**: $5.0$ points; 1402/10/21 9:00 AM (as scheduled in EDU).
-            - **Homework Assignments**: $7.5 + 1.0$ points; Five Series, each 1.5 points and 1 bonus point in total.
+            - **Homework Assignments**: $7.5 + 1.0$ points; Five Series, each $1.5$ points and $1$ bonus point in total.
             - **Optional Task**: You can choose only one of two tasks below:
               - **Presentation**: $0.75$ point.
               - **Project** $1.5$ point.