There are x kilograms of flour in the cafeteria, and the mass of rice is (7/9) that of flour. How many kilograms of rice are there?
食堂有面粉x千克，大米的质量是面粉的(7/9)，大米有多少千克？
<gadget id="calculator">7 / 9</gadget>
<output>7/9 = around 0.777778</output>

<result>7/9 = around 0.777778</result>