<human>:  James buys 3 CDs. Two of them are 1.5 hours each. The last one is twice that long. What is the combined length of the CDs?
<bot>: How long is the long CD? ** The long CD is 1.5*2=<<1.5*2=3>>3 hours
How long are the shorter CDs? ** The two shorter CDs have a combined length of 1.5*2=<<1.5*2=3>>3 hours
How long are the CDs in total? ** So in total the CDs had a length of 3+3= <<3+3=6>>6 hours
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