Aiguo = <<20=20>>20 shells

Vail = 20 - 5 = <<20-5=15>>15 shells

Stefan = 15 + 16 = <<15+16=31>>31 shells

Total = 20 + 15 + 31 = <<20+15+31=66>>66

The 3 children had 66 seashells altogether.

# Answer

66
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Stefan, Vail, and Aiguo collected seashells. Stefan had 16 more seashells than Vail. Vail had 5 less than Aiguo. Aiguo had 20 seashells. How many seashells did the 3 children have in total?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
66
Stefan, Vail, and Aiguo collected seashells. Stefan had 16 more seashells than Vail. Vail had 5 less than Aiguo. Aiguo had 20 seashells. How many seashells did the 3 children have in total?
train