A rope, used up (1/3), used up (15/16) meters. How long is this rope? (solution with equation)
一条绳子，用去(1/3)，用去了(15/16)米．这条绳子有多长？(用方程解答)
<gadget id="calculator">15 / 16</gadget>
<output>15/16 = around 0.9375</output>

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

<gadget id="calculator">(15/16) / (1/3)</gadget>
<output>45/16 = around 2.8125</output>

<result>45/16 = around 2.8125</result>