question: Dexter has five pigs. Each one eats 4 pounds of feed, twice a day. If Dexter ordered 300 pounds of feed, how many pounds of feed is left after a week?
answer: In a day, one pig consumes 4 x 2 = <<4*2=8>>8 pounds of feed.
  In a day, five pigs consume 8 x 5 = <<8*5=40>>40 pounds.
  In a week, five pigs consume 40 x 7 = <<40*7=280>>280 pounds.
  So, there are 300 - 280 = <<300-280=20>>20 pounds of feed left.
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