If x-4=7.6, then 3x-5.76=how much.
如果x-4=7.6，那么3x-5.76=多少．
<gadget id="calculator">7.6 + 4</gadget>
<output>11.6</output>

<gadget id="calculator">3 * 11.6</gadget>
<output>34.8</output>

<gadget id="calculator">34.8 - 5.76</gadget>
<output>29.04</output>

<result>29.04</result>