(1/5) of a number is 4.5 less than its 95%, find this number.
一个数的(1/5)比它的95%少4.5，求这个数．
<gadget id="calculator">95 / 100</gadget>
<output>19/20 = around 0.95</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(19/20) - (1/5)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">4.5 / (3/4)</gadget>
<output>6</output>

<result>6</result>