When a classmate calculated a-43.5+8.4, he miscalculated as a-43.5+84. How much is the result different from the correct result?
一个同学在计算a-43.5+8.4时，错算成了a-43.5+84，这样得出的结果与正确的结果相差多少？
<gadget id="calculator">84 - 8.4</gadget>
<output>75.6</output>

<result>75.6</result>