An apartment complex has 4 identical buildings.  Each building has 10 studio apartments, 20 2 person apartments, and 5 4 person apartments.  How many people live in the apartment complex if it has 75% of its maximum occupancy?
First, we find out how many people live in each building. In addition to 10 1 person apartments, as a studio apartment is for a single person, there are 20 2 person apartments meaning there are 20*2=
<gadget id="calculator">20*2</gadget>
<output>40</output>
40 people capable of living there.
We then find out how many people can live in the 4 person apartments by multiplying the number of available 4 person apartments by 4, performing 5*4=20 people capable of living there.
So, in 1 building there is room for 10+40+20=
<gadget id="calculator">10+40+20</gadget>
<output>70</output>
70 people.
We multiply this by the 4 buildings in total, finding a maximum occupancy of 4*70=
<gadget id="calculator">4*70</gadget>
<output>280</output>
280 people.
We then multiply this by .75 to find out how many people would live there at 75% of maximum occupancy, performing 280*.75= 
<gadget id="calculator">210</gadget>
<output>210</output>
210 people.

<result>210</result>