<human>:  Mary and Mike are sharing a jar of paint. Mary paints a dragon using 3 square feet worth of paint. Mike paints a castle using 2 square feet more paint than Mary used on her dragon. They both then work together to paint the biggest sun possible. If there was originally enough paint in the jar to cover 13 square feet, how many square feet of paint can be used to paint the sun?
<bot>: How many square feet of paint does Mike use? ** The castle uses 3 + 2 = <<3+2=5>>5 square feet of paint.
How many square feet of paint does the sun use? ** The sun uses 13 - 3 - 5 = <<13-3-5=5>>5 square feet of paint.
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