Question: Converting in Maple

I've made a model and i wanted it to work out a distance, which it does. But it gives me an answer in the for a/pi, where a is a number. In my model I've used angles, which maple uses as radians. But I want the answer to be a decimal number and not the fraction in the form a/pi, even thought the value a/pi when worked out is right.

 

How can I convert this a/pi into a decimal number?

Do I need to use the convert command, and if so what goes in the brackets of this command?

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