<prompt> Translate the following text to EnglishKwa kila kiwanda cha 500MW cha ziada, inaweza kupunguzwa kutoka saa za mtu 340,000 hadi saa za mtu 310,000, au saa za mtu 2,170,000 za ujenzi kwa vitengo saba vya 500MW katika kiwanda kimoja.  <response>: each additional 500 MWe plant might be reduced from 340,000 man-hours to about 310,000 man-hours, or about 2,170,000 construction man-hours for seven 500 MWe units at one plant. 