diff --git a/module2/exo1/toy_document_en.Rmd b/module2/exo1/toy_document_en.Rmd
index 3810d72badb342040e75ffaa0c189f86509d0eb5..9582761dc5f521dc4b87da0e40c34c2dcefc8052 100644
--- a/module2/exo1/toy_document_en.Rmd
+++ b/module2/exo1/toy_document_en.Rmd
@@ -1,5 +1,5 @@
 ---
-title: "Your title"
+title: "On the computation of pi"
 author: "Arnaud Legrand"
 date: "25 juin 2018"
 output: html_document
@@ -10,14 +10,12 @@ output: html_document
 knitr::opts_chunk$set(echo = TRUE)
 ```
 
-## Some explanations
+## Asking the maths library
+My computer tells me that $\pi$ is approximatively
 
-This is an R Markdown document that you can easily export to HTML, PDF, and MS Word formats. For more information on R Markdown, see <http://rmarkdown.rstudio.com>.
-
-When you click on the button **Knit**, the document will be compiled in order to re-execute the R code and to include the results into the final document. As we have shown in the video, R code is inserted as follows:
 
 ```{r cars}
-summary(cars)
+pi()
 ```
 
 It is also straightforward to include figures. For example: