There are 37 children who want to cross the river. There is only one small boat by the river. There can only be 5 people on the boat at a time. How many times can they all cross the river.
有37名小朋友要过河，河边只有一条小船，船上每次只能坐5人，至少多少次才能全部过完．
<gadget id="calculator">37 - 5</gadget>
<output>32</output>

<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">32 / 4</gadget>
<output>8</output>

<gadget id="calculator">8 + 1</gadget>
<output>9</output>

<result>9</result>