title: How to autofill values in other boxes in flutter?
body: <p>I want to autofill the other boxes with calculated values when one of the box is filled with a value. For example:<a href="https://i.stack.imgur.com/cP8qm.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/cP8qm.png" alt="Box Fields" /></a></p>
  <p>When I fill the '<em>meter</em>' value, the value in '<em>feet</em>', and '<em>centimeter</em>' should get auto-filled with respective values.
  And same for the other values.
  I couldn't come up with any idea or code (In <strong>Flutter</strong>) . Please give some help with code, plugins or extensions.</p>