The sum of 3 consecutive odd numbers is 81, what is the largest of these three odd numbers?
3个连续奇数的和是81，那么这三个奇数中最大的是多少．
<gadget id="calculator">81 / 3</gadget>
<output>27</output>

<gadget id="calculator">27 + 2</gadget>
<output>29</output>

<result>29</result>