Orange = <<4.5=4.5>>4.5 L

Cherry = 2 * 4.5 = <<2*4.5=9>>9 L

Apple = 9 - 1.5 = <<9-1.5=7.5>>7.5 L

Total punch = 4.5 + 9 + 7.5 = <<4.5+9+7.5=21>>21 L

They had 21 liters of fruit punch for the picnic.

# Answer

21
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Sunnyvale School was having a picnic. They wanted to make fruit punch. They had 4.5 liters of orange punch. They had twice as much cherry punch as orange punch and 1.5 liters less of apple juice than cherry punch. When they combined all of the fruit juices together, how many liters of fruit punch did they have?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
21
Sunnyvale School was having a picnic. They wanted to make fruit punch. They had 4.5 liters of orange punch. They had twice as much cherry punch as orange punch and 1.5 liters less of apple juice than cherry punch. When they combined all of the fruit juices together, how many liters of fruit punch did they have?
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