A shopping mall engages in a lottery and needs to make 100 prize tickets. In order to keep the winning rate at 25%, how many "Thank you for coming" tickets should be made.
商场搞抽奖活动，要制作100张奖票，为了使中奖率控制在25%，应该做多少张"谢谢光临"的奖票．
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">100 * (3/4)</gadget>
<output>75</output>

<result>75</result>