Classes 1 and 2 of a certain grade carried out tree planting activities on Arbor Day. The total number of trees planted by the two classes was the same, between 205 and 300 trees. The other people planted 7 trees each, and the other people in the second class planted 13 trees each. Find the total number of people in these two classes.
某年级一、二两个班在植树节进行植树活动，两个班植树的总棵数相同，都在205～300棵之间，两个班都有一人不植树，为大家送水，一班的其他人每人植树7棵，二班的其他人每人植树13棵．求这两个班的总人数．
<gadget id="calculator">7 * 13</gadget>
<output>91</output>

<gadget id="calculator">91 * 3</gadget>
<output>273</output>

<gadget id="calculator">273 / 7</gadget>
<output>39</output>

<gadget id="calculator">39 + 1</gadget>
<output>40</output>

<gadget id="calculator">273 / 13</gadget>
<output>21</output>

<gadget id="calculator">21 + 1</gadget>
<output>22</output>

<gadget id="calculator">40 + 22</gadget>
<output>62</output>

<result>62</result>