Remove the decimal point of a two-digit decimal to get a new number. The difference between the new number and the original number is 57.42. What is the original two-digit decimal?
把一个两位小数的小数点去掉，得到一个新数，新数与原数的差是57.42，原来的两位小数是多少．
<gadget id="calculator">100 - 1</gadget>
<output>99</output>

<gadget id="calculator">57.42 / 99</gadget>
<output>0.58</output>

<result>0.58</result>