The decimal point of a decimal is moved one place to the left, and the decimal is reduced by 19.35. What is the original value of the decimal?
一个小数的小数点向左移动一位，小数减少了19.35，这个小数原来是多少．
<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">19.35 / (9/10)</gadget>
<output>21.5</output>

<result>21.5</result>