A building is 59 meters high, the hall on the first floor is 4.6 meters high, and the height of each other floor is 3.2 meters. How many floors does this building have?
一幢楼房高59米，一楼大厅高4.6米，其余每层的高度都是3.2米．这幢楼房一共有多少层？
<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>