＝1200
104×6+3×1＝7×(395+17)
-----------------------------------------------
===（184.1
-----------------------------------------------
104×6+3×1＝7×(395+17)
104×6+3×1＝7×(395+17)
-----------------------------------------------
===（184.1
-----------------------------------------------
104×6+3×1＝7×(395+17)
