<human>:  Katie has 13 pink marbles. She has 9 fewer orange marbles than pink marbles. She has 4 times as many purple marbles as orange marbles. How many marbles does Katie have in all?
<bot>: How many orange marbles does Katie have? ** Find the number of orange marbles. 13 marbles - 9 marbles = <<13-9=4>>4 marbles
How many purple marbles does Katie have? ** Find the number of purple marbles. 4 marbles x 4 = <<4*4=16>>16marbles
How many marbles does Katie have in all? ** Find the total amount of pink, orange, and purple marbles. 13 marbles + 4 marbles + 16 marbles = 45 marbles
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