5 hectares =(50000) square meters, 0.008 square kilometers =(0.8) hectares, 20000 square kilometers = (200000) hectares.

730 hectares =(7.3) square kilometers, 80 square meters =(0.008) hectares, 620 hectares = (6.2 million) square meters.

If I can help you, please remember to adopt it, O(∩_∩)O Thank you.