A new movie costs 75 yuan per ticket, and you can enjoy a 20% discount with your student ID card. Xiaogang invited 3 classmates to watch the movie. How much did they spend on movie tickets?
一部新电影，每张票价75元，凭学生证可享受八折优惠，小刚约了3名同学去看电影，他们共花电影票钱是多少？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">75 * (4/5) * 3</gadget>
<output>180</output>

<result>180</result>