Jay Chou is about to hold a concert, Qian Zengchang ordered several tickets to resell for profit. If he sets the price at a profit of 25%, when he sells 80% and 20 tickets of this batch, he will get 40% of the expected profit in addition to recovering the cost, then how many tickets will be ordered with more money?
周杰伦即将开演唱会，钱增多订购了若干张门票转卖获利．如果他按获利25%定价，当他卖出这批门票的80%又20张时，除了收回成本之外还获得预计利润的40%，那么钱增多订购的这批门票共有多少张．
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">100 * (1/4)</gadget>
<output>25</output>

<gadget id="calculator">25 - 15</gadget>
<output>10</output>

<gadget id="calculator">2_500 / 10</gadget>
<output>250</output>

<result>250</result>