To make the four-digit number 325 □ a multiple of 3, what is the minimum number in □
要使四位数325□是3的倍数，□里最小应填多少
<gadget id="calculator">3 + 2 + 5</gadget>
<output>10</output>

<gadget id="calculator">12 - 10</gadget>
<output>2</output>

<result>2</result>