(7.9-3.06/0.68)*1.5.
(7.9-3.06/0.68)*1.5．
<gadget id="calculator">3.06 / 0.68</gadget>
<output>4.5</output>

<gadget id="calculator">7.9 - 4.5</gadget>
<output>3.4</output>

<gadget id="calculator">3.4 * 1.5</gadget>
<output>5.1</output>

<result>5.1</result>