[tex]Eurasia=54 \ 759 \ 000 \ km^2 \\ Africa=30 \ 221 \ 532 \ km^2 \\ Australia=8 \ 468 \ 300 \ km^2 \\ America=42 \ 549 \ 000 \ km^2 \\ Total=54 \ 759 \ 000 \ km^2+30 \ 221 \ 532 \ km^2+8 \ 468 \ 300 \ km^2 \\ +42 \ 549 \ 000 \ km^2 \\ \boxed{Total=135997832 \ km^2}[/tex]
