The movie theater is going to play "Wolf Totem". Ding Ding and his parents took the discount card to buy tickets. Each ticket is 15% off. Buying three tickets is 18 yuan cheaper. How much is the original price of each movie ticket?
电影院要播放《狼图腾》，丁丁和爸爸妈妈拿着优惠卡去买票，每张票打八五折，买三张票便宜了18元钱，电影票原价每张多少元？
<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">1 - (17/20)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">18 / (3/20) / 3</gadget>
<output>40</output>

<result>40</result>