conversations.from: human
conversations.value: James hurt himself exercising.  The pain subsided after 3 days, but he knew that the injury would take at least 5 times that long to fully heal. After that, he wanted to wait another 3 days before he started working out again.  If he wants to wait 3 weeks after that to start lifting heavy again, how long until he can lift heavy again?
conversations.from: assistant
conversations.value: The injury would be fully healed after 3*5=15 days
  So he would start exercising again in 15+3=18 days
  He would then wait for 3*7=21 more days to start lifting heavy again
  That means he needs to wait 18+21=39 days