The sum of 3 consecutive odd numbers is 159, what is the largest of these 3 numbers?
3个连续奇数的和是159，这3个数中最大的是多少．
<gadget id="calculator">159 / 3</gadget>
<output>53</output>

<gadget id="calculator">53 + 2</gadget>
<output>55</output>

<result>55</result>