The sum of 3 consecutive even numbers is 120, arrange from small to large, what is the third number.
连续3个偶数的和是120，从小到大排列，第三个数是多少．
<gadget id="calculator">120 / 3</gadget>
<output>40</output>

<gadget id="calculator">40 + 2</gadget>
<output>42</output>

<result>42</result>