Update README.md

Author: purva182

README.md

@@ -1,16 +1,16 @@
 # Introduction to Git and GitHub
 
-## Simple Interest Calculator
+## Simple Interest Calculator  
+A calculator that calculates simple interest given principal, annual rate of interest, and time period in years.
 
-A calculator that calculates simple interest given principal, annual rate of interest and time period in years.
+### Input:  
+- **P**: Principal amount  
+- **T**: Time period in years  
+- **R**: Annual rate of interest  
+
+### Output:  
+- **Simple Interest** = P × T × R  
 
-```
-Input:
-   p, principal amount
-   t, time period in years
-   r, annual rate of interest
-Output
-   simple interest = p*t*r
 ```
 
-_© 2022 XYZ, Inc._
+_© 2025 XYZ, Inc._