Taotao goes to the bookstore every 7 days, and Lele goes to the bookstore every 5 days. The two of them went to the bookstore together today. How many days will it take for the two of them to go to the bookstore again on the same day?
淘淘每7天去一次书店，乐乐每5天去一次书店，今天两人一起去了书店，至少要多少天后两人会再一次同一天去书店？
<gadget id="calculator">5 * 7</gadget>
<output>35</output>

<result>35</result>