The sum of 5 consecutive odd numbers is 35, what is the smallest of these 5 numbers?
5个连续奇数的和是35，这5个数中最小的一个是多少．
<gadget id="calculator">35 / 5</gadget>
<output>7</output>

<gadget id="calculator">7 - 2 - 2</gadget>
<output>3</output>

<result>3</result>