diff --git a/README.md b/README.md
index 636a725..313b102 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # kwh-cost
 
-Calculate cost of electricity.
+Calculates cost of electricity.
 
 ## How to use
 
@@ -18,10 +18,12 @@ Options are `-v, --version` to show program's version; and `-h, --help` to show
 Here is an example:
 
 ```console
-$ kwh-cost 3.68 120 30d 2h
+$ kwh-cost 3.83 120 30d 2h
 ```
 
-P.S.: Yeah, I pay 3.68 rubles per kWh. Which is just $0.05. :)
+Will give 331.83.
+
+P.S.: Yeah, I pay 3.83 rubles per kWh. Which is just $0.05. :)
 
 ## Installation