If the length of a rope is shorter than 10 meters, make a mark A from one end to 5 meters, and then mark B from the other end to 5 meters. This means that the distance between A and B is the total length of the rope (1 /9), how many meters is the distance between AB?
一根绳长比10米短，从一头量到5米处作一个记号A，再从另一头量到5米处作一个记号B，这是量得AB间的距离是绳全长的(1/9)，AB间的距离是多少米？
<gadget id="calculator">5 + 5</gadget>
<output>10</output>

<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">1 + (1/9)</gadget>
<output>10/9 = around 1.111111</output>

<gadget id="calculator">10 / (10/9)</gadget>
<output>9</output>

<gadget id="calculator">9 * (1/9)</gadget>
<output>1</output>

<result>1</result>