Two people, A and B, contract a project. A works for 12 days first, and completes half of the project. The rest is completed by the two of them in 6 days.
甲、乙两人承包一项工程，甲先工作12天，完成工程的一半，剩下的由两人合做6天完成，共得工程费480元，按道理，甲应得多少元．
<gadget id="calculator">12 + 6</gadget>
<output>18</output>

<gadget id="calculator">12 * 2</gadget>
<output>24</output>

<gadget id="calculator">18 / 24</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">480 * (3/4)</gadget>
<output>360</output>

<result>360</result>