A ticket for rapid rapids, 25% discount for promotional activities during the National Day, the current price is 30 yuan per ticket, how much is the original price?
一张激流勇进票，国庆期间优惠活动，打七五折优惠，现价是每张30元，问原价多少元？
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">30 / (3/4)</gadget>
<output>40</output>

<result>40</result>