A building is 59 meters high, the first floor is 4.6 meters high, and the other floors are 3.2 meters high. How many floors does this building have?
一幢楼高59米，一楼的层高4.6米，其余每层的层高都是3.2米．这幢楼一共有多少层？
<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>