If 50% of a rope is subtracted, there is 5.2m left. If (1/2)m is subtracted, how much m is left.
一根绳子如果减去它的50%，还剩5.2m，如果减去(1/2)m，还剩多少m．
<gadget id="calculator">50 / 100</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">5.2 / (1/2)</gadget>
<output>10.4</output>

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

<gadget id="calculator">10.4 - (1/2)</gadget>
<output>9.9</output>

<result>9.9</result>