It is known that a*(3/4)=a-(3/4), then a=how much.
已知a*(3/4)=a-(3/4)，则a=多少．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/4) * 4</gadget>
<output>3</output>

<result>3</result>