The price of white cloth is 15 yuan per meter, which is 2/5 cheaper than floral cloth. How much cheaper is white cloth per meter than floral cloth?
白布每米的价铬是15元，比花布便宜(2/5)，白布每米比花布便宜多少元？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">15 / (3/5)</gadget>
<output>25</output>

<gadget id="calculator">25 - 15</gadget>
<output>10</output>

<result>10</result>