2020(8)=2*8^3 +0+2*8^1 +0=1024+16= 1040
2020(7)=2*7^3 +0+2*7^1 +0=686+14= 700
2020(6)=2*6^3 +0+2*6^1 +0=432 + 12= 444
2020(5)=2*5^3 +0+2*5^1 +0=250+10= 260
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2020(8)=2*8^3 +0+2*8^1 +0=1024+16= 1040
2020(7)=2*7^3 +0+2*7^1 +0=686+14= 700
2020(6)=2*6^3 +0+2*6^1 +0=432 + 12= 444
2020(5)=2*5^3 +0+2*5^1 +0=250+10= 260