The difference between the two numbers is 13.63. If the minuend is reduced by 3.8 and the subtrahend is increased by 2.79, what is the difference?
两个数的差是13.63，如果被减数减少3.8，减数增加2.79，那么差是多少．
<gadget id="calculator">3.8 + 2.79</gadget>
<output>6.59</output>

<gadget id="calculator">13.63 - 6.59</gadget>
<output>7.04</output>

<result>7.04</result>