The ages of Mobi, Dakuan and Jin'er are three consecutive natural numbers, and Mobi is the oldest. The sum of the ages of the three of them and the doctor is 100 years old this year. Seventeen years later, the sum of the ages of the three of them is exactly equal to the age of the doctor. So, how old is Mobi this year?
摩比、大宽、金儿三人的年龄为3个连续的自然数，摩比年龄最大．今年他们三人与博士的年龄之和为100岁．17年后，他们三人的年龄之和恰好等于博士的年龄．那么，今年摩比多少岁．
<gadget id="calculator">17 * 2</gadget>
<output>34</output>

<gadget id="calculator">100 + 34</gadget>
<output>134</output>

<gadget id="calculator">134 / 2</gadget>
<output>67</output>

<gadget id="calculator">100 - 67</gadget>
<output>33</output>

<gadget id="calculator">33 / 3</gadget>
<output>11</output>

<gadget id="calculator">11 + 1</gadget>
<output>12</output>

<result>12</result>