How can i add numbers behind comma on item yield?

The problem that i have is that when i am creating a structure for an item and i add a component the item yield only allows me to put 3 numbers behind comma (for example: 0.456), but if i put 4 numbers behind comma like de following example: 0.4569, the number transforms to 0.457 and i want to have 4 or more numbers behind comma.

What can i do to solve this issue?