A number is equal to its (3/5) plus 20, what is the reciprocal of this number?
一个数等于它的(3/5)加上20的和，这个数的倒数是多少？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">20 / (2/5)</gadget>
<output>50</output>

<gadget id="calculator">1 / 50</gadget>
<output>1/50 = around 0.02</output>

<result>1/50 = around 0.02</result>