Xiao Wang has some commemorative stamps with a face value of 8 cents, 1 yuan and 2 yuan, with a total face value of 12.2 yuan. How many stamps does Xiao Wang have at least?
小王有一些面值8角、1元和2元的纪念邮票，总面值为12.2元．小王至少有多少张邮票？
<gadget id="calculator">32 / 8</gadget>
<output>4</output>

<gadget id="calculator">1 * 10</gadget>
<output>10</output>

<gadget id="calculator">10 / 10</gadget>
<output>1</output>

<gadget id="calculator">4 + 1 + 4</gadget>
<output>9</output>

<result>9</result>