A, B, and C contract a project. A and B cooperate for 5 days to complete (1/3) of the project, then B and C cooperate for 2 days to complete the rest of the project (1/4), and finally A and C cooperate for 5 days to complete the project. The labor cost of the whole project is 4800 yuan, how much should B get.
甲乙丙三人承包一项工程．甲、乙合作5天，完成工程的(1/3)，接着乙丙合作2天，完成余下工程的(1/4)，最后甲丙合作5天，完成这项工程，整个工程的劳务费是4800元，乙应分得多少．
<gadget id="calculator">50 + 21 + 49</gadget>
<output>120</output>

<gadget id="calculator">21 / 120</gadget>
<output>7/40 = around 0.175</output>

<gadget id="calculator">4_800 * (7/40)</gadget>
<output>840</output>

<result>840</result>