Xiaoli and Xiaohua have a total of 100 stamps. Xiaohua said to Xiaoli: "If I collect 20 more stamps, it will be twice as much as you." How many stamps does Xiaohua have?
小利和小华共有100邮票．小华对小利说："我如果再集20张，就是你的2倍．"小华有多少张邮票？
<gadget id="calculator">100 + 20</gadget>
<output>120</output>

<gadget id="calculator">2 + 1</gadget>
<output>3</output>

<gadget id="calculator">120 / 3</gadget>
<output>40</output>

<gadget id="calculator">100 - 40</gadget>
<output>60</output>

<result>60</result>