There are 40 pieces of candy, divide it into 4 parts, and the latter part is 2 more than the previous part, then how many pieces are there at least one part.
有40块糖，把它分成4份，且后一份比前一份依次多2块，那么最少一份有多少块．
<gadget id="calculator">40 - 2 - 2 - 2 - 2 - 2 - 2</gadget>
<output>28</output>

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

<gadget id="calculator">28 / 4</gadget>
<output>7</output>

<result>7</result>