There are two boxes of chalk, and box A has 50 pieces. If you take out (1/10) of the chalk from box A and put it into box B, then the number of pieces of chalk in box A and box B will be equal. How many boxes does B have? chalk?
有两盒粉笔，甲盒有50支，如果从甲盒粉笔中拿出它的(1/10)放入乙盒，这时甲、乙两盒粉笔的支数就相等，乙盒原来有多少支粉笔？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">50 * (1/10) * 2</gadget>
<output>10</output>

<gadget id="calculator">50 - 10</gadget>
<output>40</output>

<result>40</result>