diff --git a/module2/exo1/toy_document_en.Rmd b/module2/exo1/toy_document_en.Rmd
index fe0295b3fd9a0af254a700d72b3a84b6767dfa27..61b204016ee036c1322f83241403e5fe2477895e 100644
--- a/module2/exo1/toy_document_en.Rmd
+++ b/module2/exo1/toy_document_en.Rmd
@@ -1,7 +1,7 @@
 ---
-title: "How"
-Author: Meiling WU
-Date: 30.05.2022
+title: "On the computation of pi"
+Author: Da Nguyen
+Date: 28.06.2026
 output: html_document:
 ---
 
@@ -28,4 +28,6 @@ N = 1000
 df = data.frame(X = runif(N), Y = runif(N))
 df$Accept = (df$X**2 + df$Y**2 <=1)
 library(ggplot2)
-ggplot(df, aes(x=X,y=Y,color=Accept)) + geom_point(alpha=.2) + coord_fixed() + theme_bw()
\ No newline at end of file
+ggplot(df, aes(x=X,y=Y,color=Accept)) + geom_point(alpha=.2) + coord_fixed() + theme_bw()
+
+*mean(df$Accept)
\ No newline at end of file