There are some skills that call for multiplication of numbers. Many of these can be combined, or stacked, with like skills so that you have more than one multiplier affecting the outcome. In these situations the multipliers do not multiply each other but instead are added together. For example, if you have one ability that calls for you to do x2 and another that calls for you to do x3 and you combine them, you do not do x6, you do x5.