((1/6)+(7/10)-(4/15))*30.
((1/6)+(7/10)-(4/15))*30．
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">7 / 10</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">4 / 15</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">(7/10) - (4/15)</gadget>
<output>13/30 = around 0.433333</output>

<gadget id="calculator">(1/6) + (13/30)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) * 30</gadget>
<output>18</output>

<result>18</result>