15 pieces of the same glass stacked together are (5/18) meters high, how many meters is each piece of glass thick?
15块同样的玻璃叠在一起高(5/18)米，每块玻璃厚多少米？
<gadget id="calculator">5 / 18</gadget>
<output>5/18 = around 0.277778</output>

<gadget id="calculator">(5/18) / 15</gadget>
<output>1/54 = around 0.018519</output>

<result>1/54 = around 0.018519</result>