80ha是多少m²？
80ha = 800,000m²
是800,000m²，所以说成800,000m²也没问题——四舍五入的误差在0.5%以内。
反过来，80m²是多少ha？
80m² = 0ha
计算公式: m² = ha × 10,000
该数值前后的 ha → m²
35 ha350,000m²
40 ha400,000m²
45 ha450,000m²
50 ha500,000m²
55 ha550,000m²
60 ha600,000m²
65 ha650,000m²
70 ha700,000m²
75 ha750,000m²
80 ha800,000m²
85 ha850,000m²
90 ha900,000m²
95 ha950,000m²
100 ha1,000,000m²
105 ha1,050,000m²
110 ha1,100,000m²
115 ha1,150,000m²
120 ha1,200,000m²
125 ha1,250,000m²
130 ha1,300,000m²