A new batch of goods arrived in the supermarket is 7 tons in total, among which fruits account for (9/14) and grapes account for fruits (6/27). How many kilograms are there grapes?
超市新到一批货物共7t，水果占其中的(9/14)，葡萄占水果的(6/27)，请问葡萄有多少kg？
<gadget id="calculator">9 / 14</gadget>
<output>9/14 = around 0.642857</output>

<gadget id="calculator">6 / 27</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">7 * (9/14) * (2/9)</gadget>
<output>1</output>

<result>1</result>