100/(1/4)*4-100=
100/(1/4)*4-100=
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">100 / (1/4)</gadget>
<output>400</output>

<gadget id="calculator">400 * 4</gadget>
<output>1_600</output>

<gadget id="calculator">1_600 - 100</gadget>
<output>1_500</output>

<result>1_500</result>