conversations.from: human
conversations.value: I need a clearer understanding of how to solve: I bought a pair of shoes for $51. The shoes were already marked 75% off. What is the original price of the shoes?
conversations.from: assistant
conversations.value: Let X be the original price of the shoes.
  The discounted price is X - X*75% = 0.25 * X = $51.
  The original price of the shirt was X = $51 * 4 = $204.