An ant climbed (9/10) decimeters in 15 seconds, how many decimeters per second on average?
一只蚂蚁15秒爬了(9/10)分米，平均每秒爬多少分米？
<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">(9/10) / 15</gadget>
<output>3/50 = around 0.06</output>

<result>3/50 = around 0.06</result>