Calculation: 39.5-(98.8-72.9)
计算：39.5-(98.8-72.9)
<gadget id="calculator">98.8 - 72.9</gadget>
<output>25.9</output>

<gadget id="calculator">39.5 - 25.9</gadget>
<output>13.6</output>

<result>13.6</result>