The difference between the two numbers of A and B is 19.8. If the decimal point of A moves two places to the right, it is equal to the number of B. What is the number of A?
甲乙两数相差19.8，甲的小数点向右移动两位就等于乙数，则甲数是多少．
<gadget id="calculator">100 - 1</gadget>
<output>99</output>

<gadget id="calculator">19.8 / 99</gadget>
<output>0.2</output>

<result>0.2</result>