50 minus 50% of it, what's the difference?
50减去它的50%，差是多少？
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">50 * (1/2)</gadget>
<output>25</output>

<gadget id="calculator">50 - 25</gadget>
<output>25</output>

<result>25</result>