A rope is 10 meters long. After a section is used up, there is exactly 1/2 more (1/2) left than used up. How many meters are used?
一条绳子长10米，用去一段后，余下的恰好比用去的多(1/2)，用去了多少米？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 + (1/2) + 1</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">10 / (5/2)</gadget>
<output>4</output>

<result>4</result>