There is a batch of fabric, if you only make tops, you can make 10 pieces, if you only make trousers, you can make 15 pieces, how many sets of this kind of clothes can you make with this batch of fabric?
有一批布料，如果只做上衣可以做10件，如果只做裤子可以做15条，那么这批布料可以做几套这样的衣服？
<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>