To convert 5m 75cm to meters, we need to convert the centimeters to meters. Since 1 meter is equal to 100 centimeters, we divide 75 by 100 to get 0.75 meters. Adding this to 5 meters, we have a total of 5.75 meters.

To convert 82ha to km2, we need to divide by 100 to convert hectares to square meters, and then divide by 1,000,000 to convert square meters to square kilometers. Therefore, 82ha is equal to 0.82 km2.

To convert 177cm2 to m2, we divide by 10,000 since 1 square meter is equal to 10,000 square centimeters. Therefore, 177cm2 is equal to 0.0177 m2.

To convert 5.4hg to grams, we multiply by 100 since 1 hectogram is equal to 100 grams. Therefore, 5.4hg is equal to 540g.

To convert 42g to kilograms, we divide by 1000 since 1 kilogram is equal to 1000 grams. Therefore, 42g is equal to 0.042kg.

To convert 320.5 Yến to tấn, we need to know the conversion factor between Yến and tấn. Without that information, we cannot provide an accurate conversion.