Nida has 50 chocolates in which some are in 3 filled boxes and 5 pieces are not in a box. Her friend brought 25 pieces of chocolates. If all chocolates must be placed in a box, how many more boxes do they need?
There are 50 - 5 = 
<gadget id="calculator">50-5</gadget>
<output>45</output>
45 chocolates in three boxes.
So, each box is filled with 45/3 = 
<gadget id="calculator">45/3</gadget>
<output>15</output>
15 chocolates.
5 + 25 = 
<gadget id="calculator">5+25</gadget>
<output>30</output>
30 chocolates are needed to be placed in boxes.
Hence, they needed 30/15 = 
<gadget id="calculator">30/15</gadget>
<output>2</output>
2 boxes for the 30 chocolates.

<result>2</result>