There are two sets of numbers, Group A: 1, 3, 5, 7, 9...37; Group B: 2, 4, 6, 8, 10, ... 38, choose one number from Group A and one number from Group B Add, etc. How many different sums do you get?
有两组数，甲组：1、3、5、7、9…37；乙组：2、4、6、8、10、…38，从甲组任选一个数与乙组任选一个数相加，等得到多少个不同的和？
<gadget id="calculator">1 + 2</gadget>
<output>3</output>

<gadget id="calculator">38 - 3</gadget>
<output>35</output>

<gadget id="calculator">37 + 35</gadget>
<output>72</output>

<gadget id="calculator">72 / 2</gadget>
<output>36</output>

<gadget id="calculator">36 + 1</gadget>
<output>37</output>

<result>37</result>