计算：3.775°化成度分秒 73°23′24″化成度（要计算步骤）

3.775°
=3°+0.775°
=3°+0.775*60'
=3°+46.5'
=3°+46'+0.5'
=3°+46'+0.5*60"
=3°+46'+30"
=3°46'30"
73°23′24″
=73°+23′+24″
=73°+18′+5'+24″
=73°+18′+5*60"+24″
=73°+18′+300"+24″
=73°+18′+324"
=73°+18/60°+324/3600°
=73°+0.3°+0.09°
=73°.39°