Move the decimal point of the number A to the left by 2 places to get the number B. The number A is 19.8 greater than the number B. What is the number A?
将甲数的小数点向左移动2位可以得到乙数，甲数比乙数大19.8，那么甲数是多少．
<gadget id="calculator">100 - 1</gadget>
<output>99</output>

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

<gadget id="calculator">0.2 * 100</gadget>
<output>20</output>

<result>20</result>