What is the difference between 51 and its smallest multiple and multiplied by 999?
51与它的最小倍数的差乘以999，结果是多少？
<gadget id="calculator">51 - 51</gadget>
<output>0</output>

<gadget id="calculator">0 * 999</gadget>
<output>0</output>

<result>0</result>