There are three groups of workers A, B, and C. Group A needs 5 people to complete the work of 4 people in Group A; 8 people in Group C need to complete the work of 3 people in Group B. A task requires 10 people from Group A and 20 people from Group B to complete it in 3 days. If 10 people in group C are asked to do it, how many days will it take?
有甲、乙、丙三组工人，甲组4人的工作，乙组需要5人完成；乙组3人的工作，丙组需要8人完成．一项工作，需要甲组10人，乙组20人合作3天完成．如果让丙组10人去做，则需要多少天．
<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">10 * (5/4)</gadget>
<output>25/2 = around 12.5</output>

<gadget id="calculator">(25/2) + 20</gadget>
<output>65/2 = around 32.5</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">10 * 1 * (3/8)</gadget>
<output>15/4 = around 3.75</output>

<gadget id="calculator">3 / (15/4)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(65/2) * (4/5)</gadget>
<output>26</output>

<result>26</result>