Wrong result when divide by float

I have this source define tempf float define a decimal(16,2) define b integer .. let a=85945.56 let b=488 .. let tempf=a/b tempf is 156.25 actualu 176.11795081967213114754098360656 with this modification define tempf decimal(32,10) evrithing is ok. Sugestion

if accurancy is important, don't use floats!!