What is the formula equal to 3.5-(1.5-0.4)
与3.5-(1.5-0.4)相等的算式是多少
<gadget id="calculator">1.5 - 0.4</gadget>
<output>1.1</output>

<gadget id="calculator">3.5 - 1.1</gadget>
<output>2.4</output>

<result>2.4</result>