The length of a rope is equal to (2/3) plus (2/3) m of the rope, how long is the rope in m?
一根绳子的长度等于这根绳子的(2/3)加上(2/3)m，这根绳子长多少m．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

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

<gadget id="calculator">(2/3) / (1/3)</gadget>
<output>2</output>

<result>2</result>