I have two two different times in ms and I need to subtract one by other and get a result with 3 decimal digits.
Right => 0.187 - 0.165 = 0.021
I am getting 0.214 instead 0.021
You're probably doing your math wrong somehow.
I am storing these numbers in variables and subtract one by other like I exemplified above. I just need to format the result.
Try outputting all of the values to a Text object on screen, like:
Text> Set Text > num1 & " + " & num2 " =? " & answer
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