The sum of the two numbers A and B is 138.6. If the decimal point of the B number is moved to the left by one, it is equal to the A number. What is the B number?
甲乙两个数的和是138.6，如果乙数的小数点向左移动一位，就等于甲数，那么乙数是多少．
<gadget id="calculator">1 + 10</gadget>
<output>11</output>

<gadget id="calculator">138.6 / 11</gadget>
<output>12.6</output>

<gadget id="calculator">12.6 * 10</gadget>
<output>126</output>

<result>126</result>