An ant climbed (13/15) decimeters in 13 seconds, how many decimeters did it climb per second on average?
一只蚂蚁13秒爬了(13/15)分米，它平均每秒爬多少分米？
<gadget id="calculator">13 / 15</gadget>
<output>13/15 = around 0.866667</output>

<gadget id="calculator">(13/15) / 13</gadget>
<output>1/15 = around 0.066667</output>

<result>1/15 = around 0.066667</result>