question: A company spends $15000 on advertising for a year, and then spends a third of that amount on advertising for another year.  What's the total amount the company spent on advertising for the two years?
answer: 15000/3 = <<15000/3=5000>>5,000 is spent on advertisement in the second year.
  The total on advertisement for the two years is 15000+5000 = <<15000+5000=20000>>20000 dollars.
  #### 20000