In a subtraction of decimals, the difference is 5.27. If the minuend is reduced by 0.5 and the subtrahend is increased by 0.4, what is the difference now?
在一道小数减法中，差是5.27，如果被减数少0.5，减数增加0.4，则现在的差是多少．
<gadget id="calculator">0.5 + 0.4</gadget>
<output>0.9</output>

<gadget id="calculator">5.27 - 0.9</gadget>
<output>4.37</output>

<result>4.37</result>