The number of stamps for Xiaofan is Xiaoyu's (1/4). If Xiaoyu and Xiaofan give 45 stamps, the number of stamps for both will be the same. How many stamps does Xiaoyu have?
小凡的邮票张数是小雨的(1/4)，如果小雨与给小凡45张，两人的邮票张数就同样多了，小雨原来有多少张．
<gadget id="calculator">45 * 2</gadget>
<output>90</output>

<gadget id="calculator">1 / 4</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">90 / (3/4)</gadget>
<output>120</output>

<result>120</result>