A project is completed in 10 days, and it has been done for 3 days, how much of this project has been done
一项工程10天完成，已经做了3天，做了这项工程的多少
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">3 * (1/10)</gadget>
<output>3/10 = around 0.3</output>

<result>3/10 = around 0.3</result>