The number A is 15.3 smaller than the number B. If the decimal point of the number A is moved to the right, it will be as big as the number B. What is the number A?
甲数比乙数小15.3，如果把甲数的小数点向右移动一位，就和乙数一样大了，甲数是多少．
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">15.3 / 9</gadget>
<output>1.7</output>

<result>1.7</result>