The sum of 4 consecutive odd numbers is 40, what is the smallest number among them
4个连续的奇数的和是40，其中最小的一个数是多少
<gadget id="calculator">40 - 2 - 4 - 6</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>