The sum of five consecutive odd numbers is 45, what is the largest number among them?
五个连续奇数的和是45，其中最大的一个数是多少．
<gadget id="calculator">45 / 5</gadget>
<output>9</output>

<gadget id="calculator">9 + 2 + 2</gadget>
<output>13</output>

<result>13</result>