<human>:  Four kids can wash three whiteboards in 20 minutes. How long would it take, in minutes, for one kid to wash six whiteboards?
<bot>: How long does it take one kid to wash three whiteboards? ** One kid can wash three whiteboards in 20*4=<<20*4=80>>80 minutes.
How long does it take one kid to wash six whiteboards? ** One kid can wash six whiteboards in 80*(6/3)=160 minutes.
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