Nope, since the first value is integer, the second value will betreated as integer, too. So, since the integer value of 0.5 is 0, you'll get 0 as answer. However if you try 0.5 * 600 you'll get 300 because the first number is a float.

In this case, the results are actually consistent with the KiXtart documentation.
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There are two types of vessels, submarines and targets.