When the little sloppy multiplied a decimal by 100, he forgot to add 0 at the end of the product. The result was 405 less than the correct product. Do you know what the correct product is?
小马虎在口算一道一个一位小数乘100的乘法时，忘记在积的末尾添上0，结果比正确的积少了405，你知道正确的积是多少吗？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">405 / (9/10)</gadget>
<output>450</output>

<result>450</result>