450*((1/5)-(1/9))
450*((1/5)-(1/9))
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">(1/5) - (1/9)</gadget>
<output>4/45 = around 0.088889</output>

<gadget id="calculator">45 * (4/45)</gadget>
<output>4</output>

<result>4</result>