 
 <translate> First, figure out how many gallons of gas Marcus bought by multiply the gas tank's volume by the number of fill - ups: 20 gallons * 2 = 40 gallons. Then multiply that number by Marcus's fuel mileage to find how many miles he drove: 40 gallons * 30 miles / gallon = 1200 miles. Then add that amount to the initial number of miles on Marcus' car to find the final number of miles: 1728 miles + 1200 miles = 2928 miles.
Therefore, the answer is 2928. <hau> Da farko, gano yawan galan gas da Marcus ya saya ta hanyar ninka yawan tankin gas da yawan cikawa: 20 galan * 2 = 40 galan. Bayan haka, ka ninka wannan adadin da yawan man da Marcus ya yi amfani da shi don ka san nisan da ya yi: galan 40 * mil 30 a kowace galan = mil 1,200. Sa'an nan kuma ƙara wannan adadin zuwa adadin mil na farko a kan motar Marcus don samun adadin mil na ƙarshe: 1728 mil + 1200 mil = 2928 mil. Saboda haka, amsar ita ce 2928. 