piece of fabric can be used to make 10 coats or 15 trousers. If you use this piece of fabric to make matching coats and trousers, how many sets can you make?
一段布料可做上衣10件或裤子15条，如果用这段布料做成配套的上衣和裤子，可以做多少套．
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">(1/10) + (1/15)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 / (1/6)</gadget>
<output>6</output>

<result>6</result>