The difference between two numbers is 27.3. If the minuend is decreased by 3.7 and the subtrahend is increased by 3.7, what is the difference?
两个数的差是27.3，如果被减数减少3.7，减数增加3.7，这时差是多少
<gadget id="calculator">3.7 + 3.7</gadget>
<output>7.4</output>

<gadget id="calculator">27.3 - 7.4</gadget>
<output>19.9</output>

<result>19.9</result>