When Xiaoma calculates a subtraction formula, he writes 9 in the unit digit of the subtrahend as 6, and writes 6 in the tenth digit of the subtrahend as 9. The final difference is 43.6. What should be the correct answer to this question?
小马在计算一个减法算式时把被减数个位上的9写成6，把减数十分位上的6写成9，最后得到的差是43.6，这道题的正确答案应该是多少．
<gadget id="calculator">9 - 6</gadget>
<output>3</output>

<gadget id="calculator">0.9 - 0.6</gadget>
<output>0.3</output>

<gadget id="calculator">43.6 + 3 + 0.3</gadget>
<output>46.9</output>

<result>46.9</result>