18*(5/6)-5x=7．
18*(5/6)-5x=7．
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">18 * (5/6)</gadget>
<output>15</output>

<gadget id="calculator">15 - 7</gadget>
<output>8</output>

<gadget id="calculator">8 / 5</gadget>
<output>8/5 = around 1.6</output>

<result>8/5 = around 1.6</result>