The sum of five consecutive odd numbers is 175, what is the smallest number among these five numbers?
五个连续奇数的和是175，这五个数中最小的数是多少．
<gadget id="calculator">175 - 2 - 4 - 6 - 8</gadget>
<output>155</output>

<gadget id="calculator">1 + 1 + 1 + 1 + 1</gadget>
<output>5</output>

<gadget id="calculator">155 / 5</gadget>
<output>31</output>

<result>31</result>