width: 14.285714285714286%
width: 110.123456789123456789px
width: calc(14.2857%)
width: calc(100% / 7)
width: calc(100% / 7 - 10px)
width: calc(100% / 7 - 0px)
width: calc(14.2857% - 0px);
(验证直接设值时的舍入规则)1228*0.1429-10.28 = 165.2
(正常操作)1228*0.142857-10.28 =165.15(舍入)
(验证结合律是否影响)1228*0.142857-10.28 =165.15(舍入)
(验证数字舍入规则)1228*0.166667-6.66 =198.01(舍入)
(验证百分比的舍入规则)1228*0.166667-6.66 =198.01(舍入)
(扣除双数值项的影响)1228*0.1429 - 10.28 -0.01=165.19
(扣除双数值项的影响)1228*0.1429 - 10.28 -0=165.2
(扣除单数值项的影响)1228*0.142857 - 0= 175.43
(扣除双数值项的影响)1228*0.1429 - 0.02= 175.46
(扣除多数值项的影响)1228*0.1429 - 0.01= 175.47