【61-（11.9+6.4×6.4）×0.5】÷5.185 =【61-（11.9+40.96）×0.5】÷5.185 =【61-（11.9+52.86×0.5】÷5.185 =【61-26.43】÷5.185 =34.57÷5.185 =6914/1037
