Use (9/5) to divide the difference of 45 (1/5) minus 4, what is the quotient?
用(9/5)去除45个(1/5)减去4的差，商是多少？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">45 * (1/5)</gadget>
<output>9</output>

<gadget id="calculator">9 - 4</gadget>
<output>5</output>

<gadget id="calculator">9 / 5</gadget>
<output>9/5 = around 1.8</output>

<gadget id="calculator">5 / (9/5)</gadget>
<output>25/9 = around 2.777778</output>

<result>25/9 = around 2.777778</result>