A small poultry farm has 300 chickens, 200 turkeys and 80 guinea fowls. A strange, incurable disease hit the farm and every day the farmer lost 20 chickens, 8 turkeys and 5 guinea fowls. After a week, how many birds will be left in the poultry?
There are 300+200+80 = 
<gadget id="calculator">300+200+80</gadget>
<output>580</output>
580 birds in total.
Every day 20+8+5 = 
<gadget id="calculator">20+8+5</gadget>
<output>33</output>
33 birds are lost.
After a week which is 7 days, 33*7 = 
<gadget id="calculator">33*7</gadget>
<output>231</output>
231 birds would be lost.
There would be 580-231 = 
<gadget id="calculator">580-231</gadget>
<output>349</output>
349 birds left in the poultry.

<result>349</result>