Matt has 84*10 = <<84*10=840>>840 jellybeans.

Matilda has 840/2 = <<840/2=420>>420 jellybeans.

# Answer

420
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Matilda has half as many jellybeans as Matt. Matt has ten times as many jellybeans as Steve. If Steve has 84 jellybeans, how many jellybeans does Matilda have?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
420
Matilda has half as many jellybeans as Matt. Matt has ten times as many jellybeans as Steve. If Steve has 84 jellybeans, how many jellybeans does Matilda have?
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