conversations.from: human
conversations.value: Leo had 400 marbles in a jar. He packed the marbles with ten marbles in each pack, and he gave some of them to his two friends,  Manny and Neil.   He gave Manny 1/4 of the number of packs of marbles, Neil received 1/8 of the number of packs of marbles, and he kept the rest. How many packs of marbles did Leo keep?
  Work out the solution step by step.
conversations.from: assistant
conversations.value: Leo had 400/10 = 40 packs of marbles.
  He gave Manny 1/4 x 40 = 10 packs of marbles.
  And, Neil received 1/8 x 40 = 5 packs of marbles.
  Thus, Leo. gave a total of 10 + 5 = 15 packs of marbles.
  Therefore, Leo kept 40 - 15 = 25 packs of marbles.