Im stuck and need someone to help be untie this. Anyone free to help me out?

SELECT * FROM gallery2 WHERE topic_id="777435" UNION SELECT * FROM gallery2 WHERE topic_id="204535" UNION SELECT * FROM gallery2 WHERE topic_id="1111270" UNION SELECT * FROM gallery2 WHERE topic_id="1216212" UNION SELECT * FROM gallery2 WHERE topic_id="1242896" UNION SELECT * FROM gallery2 WHERE topic_id="971313" UNION SELECT * FROM gallery2 WHERE topic_id="1621668" UNION SELECT * FROM gallery2 WHERE topic_id="1612807" UNION SELECT * FROM gallery2 WHERE topic_id="883392" UNION SELECT * FROM gallery2 WHERE topic_id="1596862" UNION SELECT * FROM gallery2 WHERE topic_id="1796182" UNION SELECT * FROM gallery2 WHERE topic_id="1496102" UNION SELECT * FROM gallery2 WHERE topic_id="23769" UNION SELECT * FROM gallery2 WHERE topic_id="1466682" UNION SELECT * FROM gallery2 WHERE topic_id="1139295" UNION SELECT * FROM gallery2 WHERE topic_id="48122"