It took 4 days for a mechanical farming team to plow 6.8 hectares of cotton fields with tractors. According to this calculation, how many days will it take to plow another 13.6 hectares of cotton fields? How many
一个机耕队用拖拉机耕6.8公顷棉田，用了4天．照这样计算，再耕13.6公顷棉田，一共要用多少天？多少
<gadget id="calculator">6.8 / 4</gadget>
<output>1.7</output>

<gadget id="calculator">13.6 / 1.7</gadget>
<output>8</output>

<gadget id="calculator">8 + 4</gadget>
<output>12</output>

<result>12</result>