conversations.from: human
conversations.value: Solve the following math problem: A cake of 400 grams is divided into eight equal parts. Nathalie eats one-eighth of the cake, and Pierre eats double what Nathalie ate. How much did Pierre eat, in grams?
conversations.from: assistant
conversations.value: Nathalie ate 1/8 * 400g = 50g of cake.
  Pierre eats 2 * 50g = 100g of cake.