After exchanging the ones digit and tenths digit of the number 2.3, how many 0.1 is added to the obtained number compared with the original number?
把2.3这个数的个位数字与十分位的数字交换后，所得的数比原数增加了多少个0.1．
<gadget id="calculator">32 - 23</gadget>
<output>9</output>

<result>9</result>