conversations.from: human
conversations.value: A married couple opened a savings account. The wife committed to saving $100 every week while the husband committed to saving $225 every month. After 4 months of savings, they decided to invest half of their money in buying stocks. Each share of stocks costs $50. How many shares of stocks can they buy?
conversations.from: assistant
conversations.value: The wife saves $100/week x 4 weeks/month = $400 a month.
  Together, the wife and husband save $400/month + $225/month = $625/month.
  In 4 months, their total savings is $625/month x 4 months = $2500.
  They are going to invest $2500 / 2 = $1250.
  So, they can buy $1250 / $50/share = 25 shares of stocks.