15chain是多少m？
15chain = 301.752m
是301.752m，所以说成302m也没问题——四舍五入的误差在0.5%以内。
反过来，15m是多少chain？
15m = 0.7456chain
计算公式: m = chain × 20.1168
该数值前后的 chain → m
6 chain120.7008m
7 chain140.8176m
8 chain160.9344m
9 chain181.0512m
10 chain201.168m
11 chain221.2848m
12 chain241.4016m
13 chain261.5184m
14 chain281.6352m
15 chain301.752m
16 chain321.8688m
17 chain341.9856m
18 chain362.1024m
19 chain382.2192m
20 chain402.336m
21 chain422.4528m
22 chain442.5696m
23 chain462.6864m
24 chain482.8032m
25 chain502.92m