Distribute a batch of chemical fertilizers to villages A, B, and C at a ratio of 1:2:4. Village B is allocated 6 tons, and village A is allocated ((())/(())) of this batch of fertilizers. This batch of fertilizers How many tons in total.
把一批化肥按1：2：4分给甲、乙、丙三个村，乙村分到6吨，甲村分到这批化肥的((())/(()))，这批化肥共有多少吨．
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">1 + 2 + 4</gadget>
<output>7</output>

<gadget id="calculator">3 * 7</gadget>
<output>21</output>

<result>21</result>