conversations.from: human
conversations.value: This math problem has got me stumped: James drives 30 mph for half an hour and then twice as long for twice the speed.  How far did he drive in total?
  Can you show me the way?
conversations.from: assistant
conversations.value: His first drive was 30*.5=15 miles
  The next leg was .5*2=1 hour
  The speed of the trip was 30*2=60 mph
  So he drove 60*1=60 miles
  So in total he drove 60+15=75 miles