"How old are you?"
Translation:Скільки тобі років?
‹і› has been absent on Russian keyboard layouts for about a century, because the 1917 orthographic reform abolished the letter ‹і› in Russian. So, unless you own a typewriter from the early 20th century, you won't have ‹і› in your Russian keyboard layout.
What you need is an Ukrainian keyboard layout, not Russian. ‹і› is placed in the third row there, where the S key is placed on the QWERTY keyboard. Here's the layout 'Ukrainian (Enhanced)' available in Windows Vista and later:
Here's the default Ukrainian layout in Linux, Ukrainian (Unicode):
As you can see, the Linux version allows typing Russian letters, too. So if you're planning to learn both Russian and Ukrainian, you might look into such multilingual layouts. The Linux layout is available for Windows as a separate download, too. However, typing Russian in such layouts is cumbersome, because Russian letters were added as an after-thought and require pressing AltGr a lot.