A wooden boat travels 12 kilometers per hour, and it travels 70 kilometers against the current in 7 hours. How many hours would it take to travel the same distance along the current?
一只木船每小时行驶12千米，它逆水7小时行了70千米，如果它顺水行驶同样长的路程需要多少小时．
<gadget id="calculator">70 / 7</gadget>
<output>10</output>

<gadget id="calculator">12 - 10</gadget>
<output>2</output>

<gadget id="calculator">12 + 2</gadget>
<output>14</output>

<gadget id="calculator">70 / 14</gadget>
<output>5</output>

<result>5</result>