100rod是多少m？
100rod = 502.92m
是502.92m，所以说成503m也没问题——四舍五入的误差在0.5%以内。
反过来，100m是多少rod？
100m = 19.8839rod
计算公式: m = rod × 5.0292
该数值前后的 rod → m
10 rod50.292m
20 rod100.584m
30 rod150.876m
40 rod201.168m
50 rod251.46m
60 rod301.752m
70 rod352.044m
80 rod402.336m
90 rod452.628m
100 rod502.92m
110 rod553.212m
120 rod603.504m
130 rod653.796m
140 rod704.088m
150 rod754.38m
160 rod804.672m
170 rod854.964m
180 rod905.256m
190 rod955.548m
200 rod1,005.84m