For some oranges, there are 2 numbers of 2, and 3 numbers of 3 are left with 1. How many of these oranges are there at least?
一些橘子，2个2个数，3个3个数都余1个，这些橘子最少有多少个个．
<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<gadget id="calculator">6 + 1</gadget>
<output>7</output>

<result>7</result>