diff --git a/README.md b/README.md
index b103466139..2a2b1d78df 100644
--- a/README.md
+++ b/README.md
@@ -13,4 +13,4 @@ Output
    simple interest = p*t*r
 ```
 
-_© 2022 XYZ, Inc._
+_© 2023 XYZ, Inc._
diff --git a/simple-interest.sh b/simple-interest.sh
index 27a60fcb55..66ba972e4a 100755
--- a/simple-interest.sh
+++ b/simple-interest.sh
@@ -21,6 +21,6 @@ read r
 echo "Enter time period in years:"
 read t
 
-s=$(expr $p \* $t \* $r / 100)
+s=$$((p * t * r / 100))
 echo "The simple interest is: "
 echo $s