conversations.from: human
conversations.value: Provide a step by step solution for the following math problem: Christina's age will be half of 80 years in five years to come. If Oscar will be 3/5 times as old as Christina is now in 15 years, calculate Oscar's age now.
conversations.from: assistant
conversations.value: Christina's age will be half of 80 in five years to come, meaning in five years, Christina's age will be 1/2*80=40 years.
  If in five years Christina will be 40, currently she is 40-5=35 years old.
  Oscar will be 3/5 times as old as Christina is now in 15 years, meaning he will be 3/5*35=21 years old in 15 years.
  Currently, Oscar is 21-15=6 years old.