Two kinds of rabbits pull radishes, the white rabbit pulls 15, and after giving 3 to the gray rabbit, they both have the same amount of radishes. How many more radishes does the white rabbit pull than the gray rabbit?
两种小兔拔萝卜，白兔拔了15个，给灰兔3个后，它俩的萝卜就一样多了，白兔比灰兔多拔几个萝卜？
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<result>6</result>