A construction company is building 2 apartment buildings with 12 floors each. The apartments are almost ready to sell but all of them need doors to be completed. Each floor has 6 apartments, and each apartment needs 7 doors in total. How many doors does the company need to buy?
The number of floors is 12 floors/building x 2 buildings = 24 floors.
The number of apartments is 6 apartments/floor x 24 floors = 
<gadget id="calculator">6*24</gadget>
<output>144</output>
144 apartments.
The company has to buy 7 doors/apartment x 144 apartments = 
<gadget id="calculator">7*144</gadget>
<output>1_008</output>
1008 doors.

<result>1_008</result>