There is some sugar water, after adding a certain amount of water, the sugar content drops to 3%, after adding the same amount of water for the second time, the sugar content drops to 2%, and then adding the same amount of water for the third time, at this time What is the sugar content of sugar water.
有糖水若干，加入一定量的水后，含糖率降低到3%，第二次又加入同样多的水后，含糖率降低到2%，第三次再加入同样多的水，这时糖水的含糖率是多少．
<gadget id="calculator">3 / 100</gadget>
<output>3/100 = around 0.03</output>

<gadget id="calculator">2 / 100</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">(3/100) - (1/50)</gadget>
<output>1/100 = around 0.01</output>

<gadget id="calculator">(1/50) - (3/100)</gadget>
<output>-1/100 = around -0.01</output>

<gadget id="calculator">(1/50) + (-1/100)</gadget>
<output>1/100 = around 0.01</output>

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

<gadget id="calculator">1 + 1</gadget>
<output>2</output>

<gadget id="calculator">1 * 3</gadget>
<output>3</output>

<gadget id="calculator">1 + 3</gadget>
<output>4</output>

<gadget id="calculator">(3/100) / 4</gadget>
<output>3/400 = around 0.0075</output>

<gadget id="calculator">2 * (3/400)</gadget>
<output>3/200 = around 0.015</output>

<result>3/200 = around 0.015</result>