The sum of three consecutive odd numbers is 315, what is the largest odd number?
三个连续奇数的和是315，则最大的一个奇数是多少．
<gadget id="calculator">4 + 2 + 315</gadget>
<output>321</output>

<gadget id="calculator">1 + 1 + 1</gadget>
<output>3</output>

<gadget id="calculator">321 / 3</gadget>
<output>107</output>

<result>107</result>