Starting from 1, add 3 and 4 in turn to get the following series of numbers: 1, 4, 8, 11, 15, 18, 22... In this series of numbers, what is the smallest three-digit number.
从1开始，轮流加3和4，得到下面的一列数：1、4、8、11、15、18、22…，在这列数中，最小的三位数是多少．
<gadget id="calculator">15 * 7</gadget>
<output>105</output>

<gadget id="calculator">1 - 4</gadget>
<output>-3</output>

<gadget id="calculator">105 + (-3)</gadget>
<output>102</output>

<result>102</result>