A number (5/8) is 4 less than 20, what is this number?
一个数的(5/8)比20少4，这个数是多少？
<gadget id="calculator">20 - 4</gadget>
<output>16</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">16 / (5/8)</gadget>
<output>128/5 = around 25.6</output>

<result>128/5 = around 25.6</result>