After reducing 42 by 10 times, and then expanding it by 10 times, what is the result?
把42缩小10倍后，再扩大10倍，结果是多少．
<gadget id="calculator">42 / 10</gadget>
<output>21/5 = around 4.2</output>

<gadget id="calculator">(21/5) * 10</gadget>
<output>42</output>

<result>42</result>