<human>:  Mike is 16 years old. His sister Barbara is half as old as he is. How old is Barbara going to be when Mike is 24 years old?
<bot>: How old is Barbara currently? ** Barbara is currently 16 years / 2 = <<16/2=8>>8 years old.
How old will Mike be after 24 years? ** Mike is going to be 24 years old after 24 years - 16 years = <<24-16=8>>8 years.
How old will Barbara be when Mike is 24 years old? ** So Barbara is going to be 8 years + 8 years = <<8+8=16>>16 years old.
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