A building is 59 meters high. Except for the first floor, which is 4.6 meters high, each floor is 3.2 meters high. How many floors does this building have?
一栋楼高59米，除一楼高度是4.6米外，其余每层的高度都是3.2米，这栋楼一共有多少层？
<gadget id="calculator">59 - 4.6</gadget>
<output>54.4</output>

<gadget id="calculator">54.4 / 3.2</gadget>
<output>17</output>

<gadget id="calculator">17 + 1</gadget>
<output>18</output>

<result>18</result>