It is known that the number A is 32.4 greater than the number B, and the number B is obtained by moving the decimal point of the number A to the left. What is the number B?
已知甲数比乙数大32.4，把甲数的小数点向左移动一位就是乙数，则乙数是多少．
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">32.4 / 9</gadget>
<output>3.6</output>

<result>3.6</result>