The difference between the two numbers of A and B is 3.6. If the decimal point of B is moved one place to the right, it is equal to A. What is A?
甲乙两数的差是3.6，乙数的小数点向右移动一位就和甲数相等，甲数是(多少)
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">3.6 / 9</gadget>
<output>0.4</output>

<gadget id="calculator">0.4 * 10</gadget>
<output>4</output>

<result>4</result>