(7/30)*8+(7/30)*3-(7/30).
(7/30)*8+(7/30)*3-(7/30)．
<gadget id="calculator">7 / 30</gadget>
<output>7/30 = around 0.233333</output>

<gadget id="calculator">(7/30) * 8</gadget>
<output>28/15 = around 1.866667</output>

<gadget id="calculator">(7/30) * 3</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">(7/10) - (7/30)</gadget>
<output>7/15 = around 0.466667</output>

<gadget id="calculator">(28/15) + (7/15)</gadget>
<output>7/3 = around 2.333333</output>

<result>7/3 = around 2.333333</result>