There are 40 pieces of chalk in box A. If you take out (1/10) of it and put it into box B, there will be the same number of chalks in box A and box B. How many pieces of chalk are there in box B?
甲盒粉笔有40根，如果拿出它的(1/10)放入乙盒粉笔中，甲、乙两盒粉笔就同样多，乙盒粉笔原来有多少根？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10) - (1/10)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">40 * (4/5)</gadget>
<output>32</output>

<result>32</result>