Tickets for the East Lake Scenic Area are 30 yuan each, and children's tickets are discounted by 40% during the "June 1st" period. How much can you save by buying such a ticket?
东湖风景区的门票每张30元，"六一"期间对儿童票打六折优惠，购买一张这样的票能省多少元．
<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">30 * (3/5)</gadget>
<output>18</output>

<gadget id="calculator">30 - 18</gadget>
<output>12</output>

<result>12</result>