Dried up:800(.10)=80 eggs

800(.70)=560 eggs

Total left:800-80-560=<<800-80-560=160>>160 eggs

160/4=<<160/4=40>>40 eggs survive to hatch

# Answer

40
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
A frog lays 800 eggs a year.  10 percent dry up, and 70 percent are eaten.  1/4 of the remaining eggs end up hatching, how many frogs hatch out of the 800?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
40
A frog lays 800 eggs a year.  10 percent dry up, and 70 percent are eaten.  1/4 of the remaining eggs end up hatching, how many frogs hatch out of the 800?
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