If the product of 6 consecutive odd numbers is 135135, what is the sum of these 6 numbers?
如果6个连续奇数的乘积是135135，那么这6个数的和是多少．
<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<gadget id="calculator">3 + 5 + 7 + 9 + 11 + 13</gadget>
<output>48</output>

<result>48</result>