VBA coding dobut : can anyone help me 
im now doing useform and some calculations through excel vba
i want to input a value into textbox and want to convert  corresponding unit in another text box instantly without any button 



eg flow rate in LPM(Liter per minute ) i want to convert it into gallon per minute 

1LPM=0.2641

IF I TYPE 10LPM I WANT THE RESULT IN SECOND TEXT BOX AS (10*0.2641) as result