3: ((x)/2)=15: (3x-2)
3：((x)/2)=15：(3x-2)
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">15 * (1/2)</gadget>
<output>15/2 = around 7.5</output>

<gadget id="calculator">9 - (15/2)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">6 / (3/2)</gadget>
<output>4</output>

<result>4</result>