How can i max a calculation value?

Hello.

I want to know how i can max a calculation to a certain value. In this case its about daysCal it should when it gets down to a negative number go back to 112 and continue the calculation from there. I hope someone can help.

var dpC:DataProvider=new DataProvider()

          var weeksCal = Number

          var yearsCal = Number

          var daysCal= Number

          daysCal= (Math.floor (days-weeksCount*7))

          yearsCal=yearsSb.value

          weeksCal=weeksNo-weeksCount

                    dpC.addItem({"Weeks Training": weeksCal})

  dpC.addItem({"Seasons Training":(weeksCal)/16})

                    dpC.addItem({"Age Training": Math.floor ((weeksCal)/16+yearsCal)+"y"+(daysCal+"d")})

          dgC.dataProvider=dpC