title: What do %/% and %% mean?
body: <p>I've recently seen code like this:</p>
  
  <pre><code>library(dplyr)
  mtcars %.% mutate(carb_10 =  carb %/% 10)
  </code></pre>
  
  <p>And this....</p>
  
  <pre><code>mtcars %.% mutate(carb_10 =  carb %% 10)
  </code></pre>
  
  <p>Can anyone explain what %/% and %% do in above code?</p>