Mason opens the hood of his car and discovers that squirrels have been using his engine compartment to store nuts. If 2 busy squirrels have been stockpiling 30 nuts/day and one sleepy squirrel has been stockpiling 20 nuts/day, all for 40 days, how many nuts are in Mason's car? Let's think first. Chain of thought:
First find the number of nuts the two busy squirrels gather per day: 2 squirrels * 30 nuts / day / squirrel = 60 nuts / day. Then add the number the sleepy squirrel gathers each day: 60 nuts / day + 20 nuts / day = 80 nuts / day. Then multiply the number of nuts gathered daily by the number of days to find the total number of nuts gathered: 80 nuts / day * 40 days = 3200 nuts.
Therefore, the answer is 3200.