Choose one or several stamps from three stamps with a face value of 1.00 yuan and four stamps with a face value of 1.70 yuan to form different types of postage.
从三枚面值为1.00元的邮票和四枚面值为1.70元的邮票中任取一枚或若干枚，可组成不同的邮资种多少．
<gadget id="calculator">2 + 3 + 4 + 5 + 6 + 7 + 8</gadget>
<output>35</output>

<result>35</result>