A building with 18 floors is 59 meters high. Except for the first floor, which is 4.6 meters high, the height of each floor is the same. How many meters is the height of each other layer?
一幢共18层的楼房高59米，除一楼高度是4.6米外，其余每层高度都相同．其它每层的高度是多少米？
<gadget id="calculator">59 - 4.6</gadget>
<output>54.4</output>

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

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

<result>3.2</result>