Junjun’s family used (6/9) tons of sand to build a house. After using (4/9) tons, they brought in (5/9) tons. How many tons of sand does his house have now?
军军家造房子，原有沙子(6/9)吨，用去(4/9)吨后，又运来(5/9)吨，现在他家有多少吨沙子？
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<result>2/9 = around 0.222222</result>