1
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Calculate: $\frac53\times\frac{6}{10}\times\frac{15}{9}\times\frac{12}{20}\times\frac{25}{15}\times\frac{18}{30}\times\frac{35}{21}\times\frac{24}{40}$
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
1
Calculate: $\frac53\times\frac{6}{10}\times\frac{15}{9}\times\frac{12}{20}\times\frac{25}{15}\times\frac{18}{30}\times\frac{35}{21}\times\frac{24}{40}$
train