Push the button 2 times
Type 312213 on the roman numerals
On the green buttons, press the top right button, bottom right button twice, then top right button again.
On the right you will see a counter and two buttons, press the grey button as fast as you can, I was able to reach 276 in under 40 seconds first try.
You also don't need to stop on 276 or press the red button, just simply reaching 276 will get you the achievement
Hope this guide helped you, good luck with your achievements.