conversations.from: human
conversations.value: I need help with this problem:
  A cobra, which has 70 spots, has twice as many spots as a mamba. If there are 40 cobras and 60 mambas in a snake park, what is half the number of spots they all have combined?
conversations.from: assistant
conversations.value: A cobra, which has 70 spots, has twice as many spots as a mamba, meaning a mamba has 70/2= 35 spots.
  If there are 40 cobras in a snake park, they all have a total of 70*40 = 2800 spots.
  60 mambas in a snake park, each having 35 spots, have 60*35 = 2100 spots total.
  Together, all the snakes in the park have 2100+2800=4900 spots.
  Half the number of spots they all have combined is 1/2*4900=2450