120chain是多少m？
120chain = 2,414.016m
是2,414.016m，所以说成2,414m也没问题——四舍五入的误差在0.5%以内。
反过来，120m是多少chain？
120m = 5.9652chain
计算公式: m = chain × 20.1168
该数值前后的 chain → m
30 chain603.504m
40 chain804.672m
50 chain1,005.84m
60 chain1,207.008m
70 chain1,408.176m
80 chain1,609.344m
90 chain1,810.512m
100 chain2,011.68m
110 chain2,212.848m
120 chain2,414.016m
130 chain2,615.184m
140 chain2,816.352m
150 chain3,017.52m
160 chain3,218.688m
170 chain3,419.856m
180 chain3,621.024m
190 chain3,822.192m
200 chain4,023.36m
210 chain4,224.528m
220 chain4,425.696m