Xiaokun bought 4 lantern show tickets at a discounted price of 10% off, and the total cost was 108 yuan. How much is the original price of each ticket?
小昆按九折的优惠价买了4张灯展票，一共用去108元．每张门票的原价是多少元．
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">108 / 4 / (9/10)</gadget>
<output>30</output>

<result>30</result>