(2/3)*1.8+(5/6)x=3.7.
(2/3)*1.8+(5/6)x=3.7．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(2/3) * 1.8</gadget>
<output>1.2</output>

<gadget id="calculator">3.7 - 1.2</gadget>
<output>2.5</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">2.5 / (5/6)</gadget>
<output>3</output>

<result>3</result>