160*25%-1.3x=17.9.
160*25%-1.3x=17.9．
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">160 * (1/4)</gadget>
<output>40</output>

<gadget id="calculator">40 - 17.9</gadget>
<output>22.1</output>

<gadget id="calculator">22.1 / 1.3</gadget>
<output>17</output>

<result>17</result>