The school bought 3 boxes of performance costumes for middle school students' calligraphy exercises in the "Calligraphy Festival", 30 sets in each box, and 96 yuan per set. How much did you spend in buying the costumes?
学校为"书法节"中学生书法操的表演，购买了3箱演出服，每箱30套，每套96元，购买演出服一共用了多少元？
<gadget id="calculator">96 * 30 * 3</gadget>
<output>8_640</output>

<result>8_640</result>