((1/5)-(1/15))*45.
((1/5)-(1/15))*45．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">(1/5) - (1/15)</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">(2/15) * 45</gadget>
<output>6</output>

<result>6</result>