Calculation with decimals

[fiction]

Hi exist a way to make a calculation in decimal and the result round off?.

For example...

.@chance1 = (1/(1+10 **(((1580 - 1500)/400))));

.@chance2 = (1/(1+10 **(((1500 - 1580)/400))));

.@score1_new = 1500 + 32(1 - .@chance1);

.@score2_new = 1580 + 32(0 - .@chance2);

_____

.@chance1 = 0.38686317984

.@chance2 = 0.61313682015

.@score1_new = 1519.62037825 round off to 1520

Currently all numbers are round off to 0 when decimals exist :[

 

[Hyroshima]

when I want to round values I check if the remainder of the division is greater than 5.
example:

.@calc1 = 237/7;
.@calc1_r = 237%7;	
if(.@calc1_r > 5) .@calc1++;