0.27*3-6x=0.51.
0.27*3-6x=0.51．
<gadget id="calculator">0.27 * 3</gadget>
<output>0.81</output>

<gadget id="calculator">0.81 - 0.51</gadget>
<output>0.3</output>

<gadget id="calculator">0.3 / 6</gadget>
<output>0.05</output>

<result>0.05</result>