If one project is completed in 4 days (1/9), according to this calculation, how much is the project completed in 15 days
4天修完一项工程的(1/9)，照这样计算，15天修完这项工程的多少
<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">(1/9) / 4</gadget>
<output>1/36 = around 0.027778</output>

<gadget id="calculator">(1/36) * 15</gadget>
<output>5/12 = around 0.416667</output>

<result>5/12 = around 0.416667</result>