If 3x+1.5=7.5, then 1.5x=how much.
如果3x+1.5=7.5，那么1.5x=多少．
<gadget id="calculator">7.5 - 1.5</gadget>
<output>6</output>

<gadget id="calculator">6 / 3</gadget>
<output>2</output>

<gadget id="calculator">1.5 * 2</gadget>
<output>3</output>

<result>3</result>