47°40′37″×2+34°45′
=47°×2+40′×2+37″×2+34°45′
=94°+80′+74″+34°45′
=94°+1°20′+1′14″+34°45′
=95°21′14″+34°45′
=129°66′14″
=130°6′14″
47度 40分37秒乘2加34度45分
=94°80‘74’‘+34°45’
=128°125‘74’‘
=130°6’14‘’
47°40′37″×2=95°21′14″
95°21′14″+34°45′=130°6′14″
47°40′37″×2+34°45′=130°6′14″