When an instant answer is shown, it could be useful to have the ability to change the values interactively (like with the timer, even if it is not the same functioning).
I.E.: "9mm to cm" gives this: 9 millimeters = 0.900 centimeters . It would be great if we could change the '9' or the '0.900' of the instant answer. It would help converting many values instantly (almost :⋅) ) .