There are 1 cent, 2 cents and 5 cents coins each, how many different currency values can be formed by choosing one or two of them.
有1分、2分和5分硬币各一枚，选其中的一枚或两枚，能组成多少种不同的币值．
<gadget id="calculator">3 + 3</gadget>
<output>6</output>

<result>6</result>