What is the difference between 6.2 and the sum of 2.4 and 1.3?
6.2减去2.4与1.3的和，差是多少？
<gadget id="calculator">2.4 + 1.3</gadget>
<output>3.7</output>

<gadget id="calculator">6.2 - 3.7</gadget>
<output>2.5</output>

<result>2.5</result>