A piece of cloth can be made into 10 pieces only for tops and 15 pieces for only trousers. How many sets can you make if you make a whole set of clothes?
一匹布，只做上衣可做10件，只做裤子可做15条．如果做整套衣服可做几套？
<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>