There is an arithmetic sequence: 2, 5, 8, 11...101, how many items are there in this arithmetic sequence?
有一个等差数列：2、5、8、11…101，这个等差数列共有多少项？
<gadget id="calculator">101 - 2</gadget>
<output>99</output>

<gadget id="calculator">5 - 2</gadget>
<output>3</output>

<gadget id="calculator">99 / 3</gadget>
<output>33</output>

<gadget id="calculator">33 + 1</gadget>
<output>34</output>

<result>34</result>