308/(2+2*2+2*2*2)/(1+2+2*2*2)=
308/(2+2*2+2*2*2)/(1+2+2*2*2)=
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">2 * 2 * 2</gadget>
<output>8</output>

<gadget id="calculator">2 + 4 + 8</gadget>
<output>14</output>

<gadget id="calculator">1 + 2 + 8</gadget>
<output>11</output>

<gadget id="calculator">308 / 14 / 11</gadget>
<output>2</output>

<result>2</result>