Dmn table variable rounding using Camunda and SpringBoot (double calculation precision problem)

Question

I use Camunda and Spring Boot.

I created a dmn-table. But i discoverd a double precision calculation problem.

I need to calculate result with this dmn table. We have two variables that come from java: float a, double b. For example: a= 0.2, b=0.6 And the interval:

But the precision problem gives me b=0.600000000001~ insted of 0.6 and table gives me another interval

How can i place rounding inside the dmn table to receive variable result as #.#?

I found a way to round variable, but i doesn't work

Answer 1

I found solution. The problem was exactly with the float-values

I just added script in the Expression field