A small boat travels upstream in a 176-kilometer-long river at a speed of 30 kilometers per hour, and it takes 11 hours. How long will it take to return to the original place?
一艘小船以每小时30千米的速度在176千米长的河中逆水而行，用了11小时，那么，返回原处要用多少时间？
<gadget id="calculator">176 / 11</gadget>
<output>16</output>

<gadget id="calculator">30 - 16</gadget>
<output>14</output>

<gadget id="calculator">30 + 14</gadget>
<output>44</output>

<gadget id="calculator">176 / 44</gadget>
<output>4</output>

<result>4</result>