Uncle Li has a rope, the first time he used up the full length (1/2), and the second time he used up the rest (1/3), this is the fraction of the original length of the remaining rope ?
李大伯有一条绳子，第一次用去了全长的(1/2)，第二次用去了剩下的(1/3)，这是剩下的绳子是原来长度的几分之几？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/2) * (1/3)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 - (1/2) - (1/6)</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>