conversations.from: human
conversations.value: Can you break down the solution for me for this math problem: Tara's taking a road trip for the weekend.  She drives for two days, stopping to fill up her gas tank each time from empty to full when she needs it.  She visits 4 different gas stations in total, with the price of gas being $3, $3.50, $4, and $4.50 respectively at each.  If Tara's car has a 12-gallon tank, how much does she spend on gas for her road trip?
conversations.from: assistant
conversations.value: The first station Tara stops at charges $3 for a gallon of gas, so for her 12-gallon tank she spends 12*3= 36 dollars
  The second station Tara stops at charges $3.50 for a gallon of gas, so for her 12-gallon tank she spends 12*3.5= 42 dollars
  The third station Tara stops at charges $4 for a gallon of gas, so for her 12-gallon tank she spends 12*4= 48 dollars
  The fourth station Tara stops at charges $4.50 for a gallon of gas, so for her 12-gallon tank she spends 12*4.5= 54 dollars
  Now that we know all the individual amounts, we add 36+42+48+54= 180 dollars in gas in total.